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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Pa%C5%82ka%2C+M&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Pa%C5%82ka%2C+M&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Pa%C5%82ka%2C+M&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2008.10868">arXiv:2008.10868</a> <span> [<a href="https://arxiv.org/pdf/2008.10868">pdf</a>, <a href="https://arxiv.org/format/2008.10868">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/TIM.2020.3018515">10.1109/TIM.2020.3018515 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Synchronisation and calibration of the 24-modules J-PET prototype with 300~mm axial field of view </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">Sz. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Chhokar%2C+J">J. Chhokar</a>, <a href="/search/physics?searchtype=author&query=Ba%C5%82a%2C+M">M. Ba艂a</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Del+Grande%2C+R">R. Del Grande</a>, <a href="/search/physics?searchtype=author&query=Dadgar%2C+M">M. Dadgar</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">N. Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasinska%2C+B">B. Jasinska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Karimi%2C+H">H. Karimi</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a> , et al. (14 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2008.10868v1-abstract-short" style="display: inline;"> Research conducted in the framework of the J-PET project aims to develop a cost-effective total-body positron emission tomography scanner. As a first step on the way to construct a full-scale J-PET tomograph from long strips of plastic scintillators, a 24-strip prototype was built and tested. The prototype consists of detection modules arranged axially forming a cylindrical diagnostic chamber with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.10868v1-abstract-full').style.display = 'inline'; document.getElementById('2008.10868v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2008.10868v1-abstract-full" style="display: none;"> Research conducted in the framework of the J-PET project aims to develop a cost-effective total-body positron emission tomography scanner. As a first step on the way to construct a full-scale J-PET tomograph from long strips of plastic scintillators, a 24-strip prototype was built and tested. The prototype consists of detection modules arranged axially forming a cylindrical diagnostic chamber with the inner diameter of 360 mm and the axial field-of-view of 300 mm. Promising perspectives for a low-cost construction of a total-body PET scanner are opened due to an axial arrangement of strips of plastic scintillators, wchich have a small light attenuation, superior timing properties, and the possibility of cost-effective increase of the axial field-of-view. The presented prototype comprises dedicated solely digital front-end electronic circuits and a triggerless data acquisition system which required development of new calibration methods including time, thresholds and gain synchronization. The system and elaborated calibration methods including first results of the 24-module J-PET prototype are presented and discussed. The achieved coincidence resolving time equals to CRT = 490 $\pm$ 9 ps. This value can be translated to the position reconstruction accuracy $蟽(螖l) =$ 18 mm which is fairly position-independent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.10868v1-abstract-full').style.display = 'none'; document.getElementById('2008.10868v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication in IEEE Transactions on Instrumentation and Measurement</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.07467">arXiv:2006.07467</a> <span> [<a href="https://arxiv.org/pdf/2006.07467">pdf</a>, <a href="https://arxiv.org/format/2006.07467">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2021.165452">10.1016/j.nima.2021.165452 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The J-PET detector -- a tool for precision studies of ortho-positronium decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Bass%2C+S+D">S. D. Bass</a>, <a href="/search/physics?searchtype=author&query=Chhokar%2C+J">J. Chhokar</a>, <a href="/search/physics?searchtype=author&query=Chug%2C+N">N. Chug</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dadgar%2C+M">M. Dadgar</a>, <a href="/search/physics?searchtype=author&query=Gajewski%2C+J">J. Gajewski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Del+Grande%2C+R">R. Del Grande</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Karimi%2C+H">H. Karimi</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Kopka%2C+P">P. Kopka</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a> , et al. (19 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.07467v3-abstract-short" style="display: inline;"> The J-PET tomograph is constructed from plastic scintillator strips arranged axially in concentric cylindrical layers. It enables investigations of positronium decays by measurement of the time, position, polarization and energy deposited by photons in the scintillators, in contrast to studies conducted so far with crystal and semiconductor based detection systems where the key selection of events… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07467v3-abstract-full').style.display = 'inline'; document.getElementById('2006.07467v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.07467v3-abstract-full" style="display: none;"> The J-PET tomograph is constructed from plastic scintillator strips arranged axially in concentric cylindrical layers. It enables investigations of positronium decays by measurement of the time, position, polarization and energy deposited by photons in the scintillators, in contrast to studies conducted so far with crystal and semiconductor based detection systems where the key selection of events is based on the measurement of the photons energies. In this article we show that the J-PET tomograph system is capable of exclusive measurements of the decays of ortho-positronium atoms. We present the first positronium production results, its lifetime distribution measurements and discuss estimation of the influence of various background sources. The tomograph s performance demonstrated here makes it suitable for precision studies of positronium decays including entanglement of the final state photons, positron annihilation lifetime spectroscopy plus molecular imaging diagnostics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07467v3-abstract-full').style.display = 'none'; document.getElementById('2006.07467v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 7 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.12742">arXiv:2004.12742</a> <span> [<a href="https://arxiv.org/pdf/2004.12742">pdf</a>, <a href="https://arxiv.org/format/2004.12742">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> </div> <p class="title is-5 mathjax"> Hit-time and hit-position reconstruction in strips of plastic scintillators using multi-threshold readouts </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Chhokar%2C+J">J. Chhokar</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Farbaniec%2C+K">K. Farbaniec</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Del+Grande%2C+R">R. Del Grande</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasinska%2C+B">B. Jasinska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">Sz. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Palka%2C+M">M. Palka</a> , et al. (10 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.12742v1-abstract-short" style="display: inline;"> In this article, a new method for the reconstruction of hit-position and hit-time of photons in long scintillator detectors is investigated. This research is motivated by the recent development of the positron emission tomography scanners based on plastic scintillators. The proposed method constitutes a new way of signal processing in Multi-Voltage-Technique. It is based on the determination of th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.12742v1-abstract-full').style.display = 'inline'; document.getElementById('2004.12742v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.12742v1-abstract-full" style="display: none;"> In this article, a new method for the reconstruction of hit-position and hit-time of photons in long scintillator detectors is investigated. This research is motivated by the recent development of the positron emission tomography scanners based on plastic scintillators. The proposed method constitutes a new way of signal processing in Multi-Voltage-Technique. It is based on the determination of the degree of similarity between the registered signals and the synchronized model signals stored in a library. The library was established for a set of well defined hit-positions along the length of the scintillator. The Mahalanobis distance was used as a measure of similarity between the two compared signals. The method was validated on the experimental data measured using two-strips J-PET prototype with dimensions of 5x9x300 mm$^3$. The obtained Time-of-Flight (TOF) and spatial resolutions amount to 325~ps (FWHM) and 25~mm (FWHM), respectively. The TOF resolution was also compared to the results of an analogous study done using Linear Fitting method. The best TOF resolution was obtained with this method at four pre-defined threshold levels which was comparable to the resolution achieved from the Mahalanobis distance at two pre-defined threshold levels. Although the algorithm of Linear Fitting method is much simpler to apply than the Mahalanobis method, the application of the Mahalanobis distance requires a lower number of applied threshold levels and, hence, decreases the costs of electronics used in PET scanner. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.12742v1-abstract-full').style.display = 'none'; document.getElementById('2004.12742v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.12059">arXiv:1911.12059</a> <span> [<a href="https://arxiv.org/pdf/1911.12059">pdf</a>, <a href="https://arxiv.org/format/1911.12059">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> </div> <p class="title is-5 mathjax"> Estimating relationship between the Time Over Threshold and energy loss by photons in plastic scintillators used in the J-PET scanner </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a>, <a href="/search/physics?searchtype=author&query=Chhokar%2C+J">J. Chhokar</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Dadgar%2C+M">M. Dadgar</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajewski%2C+J">J. Gajewski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">N. Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Del+Grande%2C+R">R. Del Grande</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasinska%2C+B">B. Jasinska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Karimi%2C+H">H. Karimi</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a> , et al. (14 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.12059v1-abstract-short" style="display: inline;"> Time-Over-Threshold (TOT) technique is being used widely due to its implications in developing the multi channel readouts mainly when fast signal processing is required. Using TOT technique as a measure of energy loss instead of charge integration methods significantly reduces the signals readout cost by combining the time and energy information. Therefore, this approach can potentially be used in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.12059v1-abstract-full').style.display = 'inline'; document.getElementById('1911.12059v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.12059v1-abstract-full" style="display: none;"> Time-Over-Threshold (TOT) technique is being used widely due to its implications in developing the multi channel readouts mainly when fast signal processing is required. Using TOT technique as a measure of energy loss instead of charge integration methods significantly reduces the signals readout cost by combining the time and energy information. Therefore, this approach can potentially be used in J-PET tomograph which is build from plastic scintillators characterized by fast light signals. The drawback in adopting this technique is lying in the non-linear correlation between input energy loss and TOT of the signal. The main motivation behind this work is to develop the relationship between TOT and energy loss and validate it with the J-PET tomograph. The experiment was performed using the $^{22}$Na beta emitter source placed in the center of the J-PET tomograph. One can obtain primary photons of two different energies: 511 keV photon from the annihilation of positron (direct annihilation or through the formation of para-Positronim atom or pick-off process of ortho-Positronium atoms), and 1275 keV prompt photon. This allows to study the correlation between TOT values and energy loss for energy range up to 1000 keV. As the photon interacts dominantly via Compton scattering inside the plastic scintillator, there is no direct information of primary photon energy. However, using the J-PET geometry one can measure the scattering angle of the interacting photon. Since, $^{22}$Na source emits photons of two different energies, it is required to know unambiguously the energy of incident photons and its corresponding scattering angle for the estimation of energy deposition. In this work, the relationship between Time Over Threshold and energy loss by interacting photons inside the plastic scintillators used in J-PET scanner is established for a energy deposited range 100-1000 keV <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.12059v1-abstract-full').style.display = 'none'; document.getElementById('1911.12059v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.06841">arXiv:1911.06841</a> <span> [<a href="https://arxiv.org/pdf/1911.06841">pdf</a>, <a href="https://arxiv.org/format/1911.06841">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> </div> <p class="title is-5 mathjax"> Performance assessment of the 2$纬$ positronium imaging with the total-body PET scanners </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Bura%2C+Z">Z. Bura</a>, <a href="/search/physics?searchtype=author&query=Chhokar%2C+C">C. Chhokar</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=1%2C+M+D">M. Dadgar 1</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajewski%2C+J">J. Gajewski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Del+Grande%2C+R">R. Del Grande</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+A">A. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Karimi%2C+H">H. Karimi</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Ma%C5%82czak%2C+P">P. Ma艂czak</a> , et al. (17 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.06841v1-abstract-short" style="display: inline;"> In living organisms the positron-electron annihilation (occurring during the PET imaging) proceeds in about 30% via creation of a metastable ortho-positronium atom. In the tissue, due to the pick-off and conversion processes, over 98% of ortho-positronia annihilate into two 511~keV photons. In this article we assess the feasibility for reconstruction of the mean ortho-positronium lifetime image ba… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.06841v1-abstract-full').style.display = 'inline'; document.getElementById('1911.06841v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.06841v1-abstract-full" style="display: none;"> In living organisms the positron-electron annihilation (occurring during the PET imaging) proceeds in about 30% via creation of a metastable ortho-positronium atom. In the tissue, due to the pick-off and conversion processes, over 98% of ortho-positronia annihilate into two 511~keV photons. In this article we assess the feasibility for reconstruction of the mean ortho-positronium lifetime image based on annihilations into two photons. The main objectives of this work include: (i) estimation of the sensitivity of the total-body PET scanners for the ortho-positronium mean lifetime imaging using $2纬$ annihilations, and (ii) estimation of the spatial and time resolution of the ortho-positronium image as a function of the coincidence resolving time (CRT) of the scanner. Simulations are conducted assuming that radiopharmaceutical is labelled with $^{44}Sc$ isotope emitting one positron and one prompt gamma. The image is reconstructed on the basis of triple coincidence events. The ortho-positronium lifetime spectrum is determined for each voxel of the image. Calculations were performed for cases of total-body detectors build of (i) LYSO scintillators as used in the EXPLORER PET, and (ii) plastic scintillators as anticipated for the cost-effective total-body J-PET scanner. To assess the spatial and time resolution the three cases were considered assuming that CRT is equal to 140ps, 50ps and 10ps. The estimated total-body PET sensitivity for the registration and selection of image forming triple coincidences is larger by a factor of 12.2 (for LYSO PET) and by factor of 4.7 (for plastic PET) with respect to the sensitivity for the standard $2纬$ imaging by LYSO PET scanners with AFOV=20cm. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.06841v1-abstract-full').style.display = 'none'; document.getElementById('1911.06841v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1901.06204">arXiv:1901.06204</a> <span> [<a href="https://arxiv.org/pdf/1901.06204">pdf</a>, <a href="https://arxiv.org/format/1901.06204">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s10751-019-1629-0">10.1007/s10751-019-1629-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Simulation studies of annihilation-photon's polarisation via Compton scattering with the J-PET tomograph </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">N. Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Raj%2C+J">J. Raj</a> , et al. (10 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1901.06204v1-abstract-short" style="display: inline;"> J-PET is the first positron-emission tomograph (PET) constructed from plastic scintillators. It was optimized for the detection of photons from electron-positron annihilation. Such photons, having an energy of 511 keV, interact with electrons in plastic scintillators predominantly via the Compton effect. Compton scattering is at most probable at an angle orthogonal to the electric field vector of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.06204v1-abstract-full').style.display = 'inline'; document.getElementById('1901.06204v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1901.06204v1-abstract-full" style="display: none;"> J-PET is the first positron-emission tomograph (PET) constructed from plastic scintillators. It was optimized for the detection of photons from electron-positron annihilation. Such photons, having an energy of 511 keV, interact with electrons in plastic scintillators predominantly via the Compton effect. Compton scattering is at most probable at an angle orthogonal to the electric field vector of the interacting photon. Thus registration of multiple photon scatterings with J-PET enables to determine the polarization of the annihilation photons. In this contribution we present estimates on the physical limitation in the accuracy of the polarization determination of $511$~keV photons with the J-PET detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.06204v1-abstract-full').style.display = 'none'; document.getElementById('1901.06204v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to Hyperfine Interactions</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.10397">arXiv:1809.10397</a> <span> [<a href="https://arxiv.org/pdf/1809.10397">pdf</a>, <a href="https://arxiv.org/format/1809.10397">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-018-6461-1">10.1140/epjc/s10052-018-6461-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Feasibility studies of the polarization of photons beyond the optical wavelength regime with the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Ba%C5%82a%2C+M">M. Ba艂a</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Del+Grande%2C+R">R. Del Grande</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+L">L. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raj%2C+J">J. Raj</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a> , et al. (9 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.10397v1-abstract-short" style="display: inline;"> J-PET is a detector optimized for registration of photons from the electron-positron annihilation via plastic scintillators where photons interact predominantly via Compton scattering. Registration of both primary and scattered photons enables to determinate the linear polarization of the primary photon on the event by event basis with a certain probability. Here we present quantitative results on… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.10397v1-abstract-full').style.display = 'inline'; document.getElementById('1809.10397v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.10397v1-abstract-full" style="display: none;"> J-PET is a detector optimized for registration of photons from the electron-positron annihilation via plastic scintillators where photons interact predominantly via Compton scattering. Registration of both primary and scattered photons enables to determinate the linear polarization of the primary photon on the event by event basis with a certain probability. Here we present quantitative results on the feasibility of such polarization measurements of photons from the decay of positronium with the J-PET and explore the physical limitations for the resolution of the polarization determination of 511 keV photons via Compton scattering. For scattering angles of about 82 deg (where the best contrast for polarization measurement is theoretically predicted) we find that the single event resolution for the determination of the polarization is about 40 deg (predominantly due to properties of the Compton effect). However, for samples larger than ten thousand events the J-PET is capable of determining relative average polarization of these photons with the precision of about few degrees. The obtained results open new perspectives for studies of various physics phenomena such as quantum entanglement and tests of discrete symmetries in decays of positronium and extend the energy range of polarization measurements by five orders of magnitude beyond the optical wavelength regime. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.10397v1-abstract-full').style.display = 'none'; document.getElementById('1809.10397v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 14 figures, submitted to EPJ C</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.09693">arXiv:1809.09693</a> <span> [<a href="https://arxiv.org/pdf/1809.09693">pdf</a>, <a href="https://arxiv.org/format/1809.09693">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2019.03.082">10.1016/j.nima.2019.03.082 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The FAZIA setup: a review on the electronics and the mechanical mounting </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Valdr%C3%A9%2C+S">S. Valdr茅</a>, <a href="/search/physics?searchtype=author&query=Casini%2C+G">G. Casini</a>, <a href="/search/physics?searchtype=author&query=Neindre%2C+N+L">N. Le Neindre</a>, <a href="/search/physics?searchtype=author&query=Bini%2C+M">M. Bini</a>, <a href="/search/physics?searchtype=author&query=Boiano%2C+A">A. Boiano</a>, <a href="/search/physics?searchtype=author&query=Borderie%2C+B">B. Borderie</a>, <a href="/search/physics?searchtype=author&query=Edelbruck%2C+P">P. Edelbruck</a>, <a href="/search/physics?searchtype=author&query=Poggi%2C+G">G. Poggi</a>, <a href="/search/physics?searchtype=author&query=Salomon%2C+F">F. Salomon</a>, <a href="/search/physics?searchtype=author&query=Tortone%2C+G">G. Tortone</a>, <a href="/search/physics?searchtype=author&query=Alba%2C+R">R. Alba</a>, <a href="/search/physics?searchtype=author&query=Barlini%2C+S">S. Barlini</a>, <a href="/search/physics?searchtype=author&query=Bonnet%2C+E">E. Bonnet</a>, <a href="/search/physics?searchtype=author&query=Bougault%2C+R">R. Bougault</a>, <a href="/search/physics?searchtype=author&query=Bougard%2C+A">A. Bougard</a>, <a href="/search/physics?searchtype=author&query=Brulin%2C+G">G. Brulin</a>, <a href="/search/physics?searchtype=author&query=Bruno%2C+M">M. Bruno</a>, <a href="/search/physics?searchtype=author&query=Buccola%2C+A">A. Buccola</a>, <a href="/search/physics?searchtype=author&query=Camaiani%2C+A">A. Camaiani</a>, <a href="/search/physics?searchtype=author&query=Chbihi%2C+A">A. Chbihi</a>, <a href="/search/physics?searchtype=author&query=Ciampi%2C+C">C. Ciampi</a>, <a href="/search/physics?searchtype=author&query=Cicerchia%2C+M">M. Cicerchia</a>, <a href="/search/physics?searchtype=author&query=Cinausero%2C+M">M. Cinausero</a>, <a href="/search/physics?searchtype=author&query=Dell%27Aquila%2C+D">D. Dell'Aquila</a>, <a href="/search/physics?searchtype=author&query=Desrues%2C+P">P. Desrues</a> , et al. (56 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.09693v2-abstract-short" style="display: inline;"> In this paper the technological aspects of the FAZIA array will be explored. After a productive commissioning phase, FAZIA blocks started to measure and give very useful data to explore the physics of Fermi energy heavy-ion reactions. This was possible thanks to many technical measures and innovations developed in the commissioning phase and tuned during the first experimental campaigns. This pape… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.09693v2-abstract-full').style.display = 'inline'; document.getElementById('1809.09693v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.09693v2-abstract-full" style="display: none;"> In this paper the technological aspects of the FAZIA array will be explored. After a productive commissioning phase, FAZIA blocks started to measure and give very useful data to explore the physics of Fermi energy heavy-ion reactions. This was possible thanks to many technical measures and innovations developed in the commissioning phase and tuned during the first experimental campaigns. This paper gives a detailed description of the present status of the FAZIA setup from the electronic and mechanical point of view, trying also to trace a path for new improvements and refinements of the apparatus. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.09693v2-abstract-full').style.display = 'none'; document.getElementById('1809.09693v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 9 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl. Instrum. Meth. A 930 (2019) 27-36 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.05175">arXiv:1809.05175</a> <span> [<a href="https://arxiv.org/pdf/1809.05175">pdf</a>, <a href="https://arxiv.org/format/1809.05175">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s10751-018-1517-z">10.1007/s10751-018-1517-z <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Commissioning of the J-PET detector in view of the positron annihilation lifetime spectroscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">N. Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+K+K+%C5%81">K. Kacprzak 艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Raj%2C+J">J. Raj</a>, <a href="/search/physics?searchtype=author&query=Rakoczy%2C+K">K. Rakoczy</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.05175v1-abstract-short" style="display: inline;"> The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET device built from plastic scintillators. It is a multi-purpose detector designed for medical imaging and for studies of properties of positronium atoms in porous matter and in living organisms. In this article we report on the commissioning of the J-PET detector in view of studies of positronium decays. We present results of ana… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.05175v1-abstract-full').style.display = 'inline'; document.getElementById('1809.05175v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.05175v1-abstract-full" style="display: none;"> The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET device built from plastic scintillators. It is a multi-purpose detector designed for medical imaging and for studies of properties of positronium atoms in porous matter and in living organisms. In this article we report on the commissioning of the J-PET detector in view of studies of positronium decays. We present results of analysis of the positron lifetime measured in the porous polymer. The obtained results prove that J-PET is capable of performing simultaneous imaging of the density distribution of annihilation points as well as positron annihilation lifetime spectroscopy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.05175v1-abstract-full').style.display = 'none'; document.getElementById('1809.05175v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 2 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.00847">arXiv:1809.00847</a> <span> [<a href="https://arxiv.org/pdf/1809.00847">pdf</a>, <a href="https://arxiv.org/format/1809.00847">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s10751-018-1527-x">10.1007/s10751-018-1527-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A feasibility study of the time reversal violation test based on polarization of annihilation photons from the decay of ortho-Positronium with the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raj%2C+J">J. Raj</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">N. Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">Sz. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Palka%2C+M">M. Palka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Niedzwiecka%2C+M">M. Pawlik-Niedzwiecka</a>, <a href="/search/physics?searchtype=author&query=Raczynski%2C+L">L. Raczynski</a>, <a href="/search/physics?searchtype=author&query=Rakoczy%2C+K">K. Rakoczy</a> , et al. (9 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.00847v1-abstract-short" style="display: inline;"> The Jagiellonian Positron Emission Tomograph (J-PET) is a novel de- vice being developed at Jagiellonian University in Krakow, Poland based on or- ganic scintillators. J-PET is an axially symmetric and high acceptance scanner that can be used as a multi-purpose detector system. It is well suited to pur- sue tests of discrete symmetries in decays of positronium in addition to medical imaging. J-PET… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.00847v1-abstract-full').style.display = 'inline'; document.getElementById('1809.00847v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.00847v1-abstract-full" style="display: none;"> The Jagiellonian Positron Emission Tomograph (J-PET) is a novel de- vice being developed at Jagiellonian University in Krakow, Poland based on or- ganic scintillators. J-PET is an axially symmetric and high acceptance scanner that can be used as a multi-purpose detector system. It is well suited to pur- sue tests of discrete symmetries in decays of positronium in addition to medical imaging. J-PET enables the measurement of both momenta and the polarization vectors of annihilation photons. The latter is a unique feature of the J-PET detector which allows the study of time reversal symmetry violation operator which can be constructed solely from the annihilation photons momenta before and after the scattering in the detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.00847v1-abstract-full').style.display = 'none'; document.getElementById('1809.00847v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.00241">arXiv:1808.00241</a> <span> [<a href="https://arxiv.org/pdf/1808.00241">pdf</a>, <a href="https://arxiv.org/format/1808.00241">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6560/aad29b">10.1088/1361-6560/aad29b <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Estimating the NEMA characteristics of the J-PET tomograph using the GATE package </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">Pawe艂 Kowalski</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">Wojciech Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Shopa%2C+R">Roman Shopa</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">Lech Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">Konrad Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">Catalina Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">Eryk Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">Kamil Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">Aleksander Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">Marek Gorgol</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">Neha Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B">Beatrix Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">Bo偶ena Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁ukasz Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">Daria Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">Grzegorz Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">Tomasz Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">Wojciech Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">Ewelina Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">Muhsin Mohammed</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">Szymon Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">Marek Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">Monika Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raj%2C+J">Juhi Raj</a>, <a href="/search/physics?searchtype=author&query=Rakoczy%2C+K">Kamil Rakoczy</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1808.00241v1-abstract-short" style="display: inline;"> The novel whole-body PET system based on plastic scintillators is developed by the {J-PET} Collaboration. It consists of plastic scintillator strips arranged axially in the form of a cylinder, allowing the cost-effective construction of the total-body PET. In order to determine properties of the scanner prototype and optimize its geometry, advanced computer simulations using the GATE software were… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.00241v1-abstract-full').style.display = 'inline'; document.getElementById('1808.00241v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.00241v1-abstract-full" style="display: none;"> The novel whole-body PET system based on plastic scintillators is developed by the {J-PET} Collaboration. It consists of plastic scintillator strips arranged axially in the form of a cylinder, allowing the cost-effective construction of the total-body PET. In order to determine properties of the scanner prototype and optimize its geometry, advanced computer simulations using the GATE software were performed. The spatial resolution, the sensitivity, the scatter fraction and the noise equivalent count rate were estimated according to the NEMA norm as a function of the length of the tomograph, number of the detection layers, diameter of the tomographic chamber and for various types of the applied readout. For the single-layer geometry with the diameter of 85 cm, strip length of 100 cm, cross-section of 4 mm x 20 mm and silicon photomultipliers with the additional layer of wavelength shifter as the readout, the spatial resolution (FWHM) in the centre of the scanner is equal to 3 mm (radial, tangential) and 6 mm (axial). For the analogous double-layer geometry with the same readout, diameter and scintillator length, with the strip cross-section of 7 mm x 20 mm, the NECR peak of 300 kcps was reached at 40 kBq/cc activity concentration, the scatter fraction is estimated to about 35% and the sensitivity at the centre amounts to 14.9 cps/kBq. Sensitivity profiles were also determined. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.00241v1-abstract-full').style.display = 'none'; document.getElementById('1808.00241v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Kowalski, Pawe艂, et al. "Estimation of the NEMA characteristics of the J-PET tomograph using the GATE package." Physics in medicine and biology (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1807.10754">arXiv:1807.10754</a> <span> [<a href="https://arxiv.org/pdf/1807.10754">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/TMI.2018.2837741">10.1109/TMI.2018.2837741 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evaluation of Single-Chip, Real-Time Tomographic Data Processing on FPGA - SoC Devices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Flak%2C+B">B. Flak</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kajetanowicz%2C+M">M. Kajetanowicz</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rajda%2C+P">P. Rajda</a> , et al. (14 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1807.10754v1-abstract-short" style="display: inline;"> A novel approach to tomographic data processing has been developed and evaluated using the Jagiellonian PET (J-PET) scanner as an example. We propose a system in which there is no need for powerful, local to the scanner processing facility, capable to reconstruct images on the fly. Instead we introduce a Field Programmable Gate Array (FPGA) System-on-Chip (SoC) platform connected directly to data… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.10754v1-abstract-full').style.display = 'inline'; document.getElementById('1807.10754v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1807.10754v1-abstract-full" style="display: none;"> A novel approach to tomographic data processing has been developed and evaluated using the Jagiellonian PET (J-PET) scanner as an example. We propose a system in which there is no need for powerful, local to the scanner processing facility, capable to reconstruct images on the fly. Instead we introduce a Field Programmable Gate Array (FPGA) System-on-Chip (SoC) platform connected directly to data streams coming from the scanner, which can perform event building, filtering, coincidence search and Region-Of-Response (ROR) reconstruction by the programmable logic and visualization by the integrated processors. The platform significantly reduces data volume converting raw data to a list-mode representation, while generating visualization on the fly. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.10754v1-abstract-full').style.display = 'none'; document.getElementById('1807.10754v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">IEEE Transactions on Medical Imaging, 17 May 2018</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.11696">arXiv:1805.11696</a> <span> [<a href="https://arxiv.org/pdf/1805.11696">pdf</a>, <a href="https://arxiv.org/format/1805.11696">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6560/aafe20">10.1088/1361-6560/aafe20 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Feasibility study of the positronium imaging with the J-PET tomograph </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B">B. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Raj%2C+J">J. Raj</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a>, <a href="/search/physics?searchtype=author&query=Shivani"> Shivani</a>, <a href="/search/physics?searchtype=author&query=Shopa%2C+R+Y">R. Y. Shopa</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1805.11696v3-abstract-short" style="display: inline;"> A detection system of the conventional PET tomograph is set-up to record data from e+ e- annihilation into two photons with energy of 511 keV, and it gives information on the density distribution of a radiopharmaceutical in the body of the object. In this paper we explore the possibility of performing the three gamma photons imaging based on ortho-positronium annihilation, as well as the possibili… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.11696v3-abstract-full').style.display = 'inline'; document.getElementById('1805.11696v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.11696v3-abstract-full" style="display: none;"> A detection system of the conventional PET tomograph is set-up to record data from e+ e- annihilation into two photons with energy of 511 keV, and it gives information on the density distribution of a radiopharmaceutical in the body of the object. In this paper we explore the possibility of performing the three gamma photons imaging based on ortho-positronium annihilation, as well as the possibility of positronium mean lifetime imaging with the J-PET tomograph constructed from plastic scintillators. For this purposes simulations of the ortho-positronium formation and its annihilation into three photons were performed taking into account distributions of photons' momenta as predicted by the theory of quantum electrodynamics and the response of the J-PET tomograph. In order to test the proposed ortho-positronium lifetime image reconstruction method, we concentrate on the decay of the ortho-positronium into three photons and applications of radiopharmaceuticals labeled with isotopes emitting a prompt gamma quantum. The proposed method of imaging is based on the determination of hit-times and hit-positions of registered photons which enables the reconstruction of the time and position of the annihilation point as well as the lifetime of the ortho-positronium on an event-by-event basis. We have simulated the production of the positronium in a cylindrical phantom composed of a set of different materials in which the ortho-positronium lifetime varied from 2.0 ns to 3.0 ns, as expected for ortho-positronium created in the human body. The presented reconstruction method for total-body J-PET like detector allows to achieve a mean lifetime resolution of about 40 ps. Recent Positron Annihilation Lifetime Spectroscopy measurements of cancerous and healthy uterine tissues show that this sensitivity may allow to study the morphological changes in cell structures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.11696v3-abstract-full').style.display = 'none'; document.getElementById('1805.11696v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">accepted in PMB (http://iopscience.iop.org/article/10.1088/1361-6560/aafe20)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.07148">arXiv:1804.07148</a> <span> [<a href="https://arxiv.org/pdf/1804.07148">pdf</a>, <a href="https://arxiv.org/format/1804.07148">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Feasibility study of the time reversal symmetry tests in decays of metastable positronium atoms with the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">N. Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kacprzak%2C+K">K. Kacprzak</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Raj%2C+J">J. Raj</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a>, <a href="/search/physics?searchtype=author&query=Shivani"> Shivani</a> , et al. (7 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1804.07148v1-abstract-short" style="display: inline;"> This article reports on the feasibility of testing of the symmetry under reversal in time in a purely leptonic system constituted by positronium atoms using the J-PET detector. The present state of T symmetry tests is discussed with an emphasis on the scarcely explored sector of leptonic systems. Two possible strategies of searching for manifestations of T violation in non-vanishing angular correl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.07148v1-abstract-full').style.display = 'inline'; document.getElementById('1804.07148v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.07148v1-abstract-full" style="display: none;"> This article reports on the feasibility of testing of the symmetry under reversal in time in a purely leptonic system constituted by positronium atoms using the J-PET detector. The present state of T symmetry tests is discussed with an emphasis on the scarcely explored sector of leptonic systems. Two possible strategies of searching for manifestations of T violation in non-vanishing angular correlations of final state observables in the decays of metastable triplet states of positronium available with J-PET are proposed and discussed. Results of a pilot measurement with J-PET and assessment of its performance in reconstruction of three-photon decays are shown along with an analysis of its impact on the sensitivity of the detector for the determination of T -violation sensitive observables. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.07148v1-abstract-full').style.display = 'none'; document.getElementById('1804.07148v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 9 figures. Submitted to Advances in High Energy Physics</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1803.00996">arXiv:1803.00996</a> <span> [<a href="https://arxiv.org/pdf/1803.00996">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Towards 2+1 photon tomography: Energy-based selection of two 511 keV photons and a prompt photon with the J-PET scanner </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mase%C5%82ek%2C+R">R. Mase艂ek</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Shopa%2C+R">R. Shopa</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B">B. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a> , et al. (9 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1803.00996v1-abstract-short" style="display: inline;"> The possibility to separate signals caused by 511 keV photons created in annihilation of electron-positron pairs and the so-called prompt photons from nuclei de- excitation is investigated. It could potentially be used to improve the quality of reconstructed images in the J-PET scanner in 2+1 photon tomography. Firstly, a research is conducted for several radioisotopes that decay via \b{eta}+ deca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.00996v1-abstract-full').style.display = 'inline'; document.getElementById('1803.00996v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1803.00996v1-abstract-full" style="display: none;"> The possibility to separate signals caused by 511 keV photons created in annihilation of electron-positron pairs and the so-called prompt photons from nuclei de- excitation is investigated. It could potentially be used to improve the quality of reconstructed images in the J-PET scanner in 2+1 photon tomography. Firstly, a research is conducted for several radioisotopes that decay via \b{eta}+ decay followed by de-excitation of an excited nucleus. Efficiency, purity and false positive rate are calculated for each isotope as a function of energy deposited threshold, with a hypothesis that signals caused by 511 keV photons deposit smaller values of energy than 1 z 13the selected threshold, while prompt photons deposit larger energy than the threshold. Analysis of the results accompanied with physical properties of radioisotopes suggests using 44 Sc, which is the most promising candidate for medical applications. With the use of GATE and J-POS simulation software, in-phantom scattering was introduced and the best energy deposited threshold value was estimated to be approximately 375 keV. It corresponds to almost 100% efficiency for 511 keV signals, 75% purity for 511 keV photons, and approximately 70% efficiency and purity for prompt photons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1803.00996v1-abstract-full').style.display = 'none'; document.getElementById('1803.00996v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 March, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 11 figures, 2 tables, proceedings from "Young Scientists" conferences in Warsaw, Poland, 2017</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1711.04512">arXiv:1711.04512</a> <span> [<a href="https://arxiv.org/pdf/1711.04512">pdf</a>, <a href="https://arxiv.org/format/1711.04512">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.48.1737">10.5506/APhysPolB.48.1737 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Human Tissues Investigation Using PALS Technique </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Zgardzi%C5%84ska%2C+B">B. Zgardzi艅ska</a>, <a href="/search/physics?searchtype=author&query=Cho%C5%82ubek%2C+G">G. Cho艂ubek</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Wiktor%2C+K">K. Wiktor</a>, <a href="/search/physics?searchtype=author&query=Wysogld%2C+K">K. Wysogld</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B">B. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jod%C5%82owska-J%C4%99drych%2C+B">B. Jod艂owska-J臋drych</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a> , et al. (12 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1711.04512v1-abstract-short" style="display: inline;"> Samples of uterine leiomyomatis and normal tissues taken from patients after surgery were investigated using the Positron Annihilation Lifetime Spectroscopy (PALS). Significant differences in all PALS parameters between normal and diseased tissues were observed. For all studied patients, it was found that the values of the free annihilation and ortho-positronium lifetime are larger for the tumorou… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.04512v1-abstract-full').style.display = 'inline'; document.getElementById('1711.04512v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1711.04512v1-abstract-full" style="display: none;"> Samples of uterine leiomyomatis and normal tissues taken from patients after surgery were investigated using the Positron Annihilation Lifetime Spectroscopy (PALS). Significant differences in all PALS parameters between normal and diseased tissues were observed. For all studied patients, it was found that the values of the free annihilation and ortho-positronium lifetime are larger for the tumorous tissues than for the healthy ones. For most of the patients, the intensity of the free annihilation and ortho-positronium annihilation was smaller for the tumorous than for the healthy tissues. For the first time, in this kind of studies, the $3纬$ fraction of positron annihilation was determined to describe changes in the tissue porosity during morphologic alteration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.04512v1-abstract-full').style.display = 'none'; document.getElementById('1711.04512v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Presented at the 2nd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics, Krak贸w, Poland, June 4-9, 2017</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Physica Polonica B 48 2017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1711.00365">arXiv:1711.00365</a> <span> [<a href="https://arxiv.org/pdf/1711.00365">pdf</a>, <a href="https://arxiv.org/format/1711.00365">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.48.1611">10.5506/APhysPolB.48.1611 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Introduction of total variation regularization into filtered backprojection algorithm </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Shopa%2C+R">R. Shopa</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B">B. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kisielewska-Kami%C5%84ska%2C+D">D. Kisielewska-Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1711.00365v1-abstract-short" style="display: inline;"> In this paper we extend the state-of-the-art filtered backprojection (FBP) method with application of the concept of Total Variation regularization. We compare the performance of the new algorithm with the most common form of regularizing in the FBP image reconstruction via apodizing functions. The methods are validated in terms of cross-correlation coefficient between reconstructed and real image… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.00365v1-abstract-full').style.display = 'inline'; document.getElementById('1711.00365v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1711.00365v1-abstract-full" style="display: none;"> In this paper we extend the state-of-the-art filtered backprojection (FBP) method with application of the concept of Total Variation regularization. We compare the performance of the new algorithm with the most common form of regularizing in the FBP image reconstruction via apodizing functions. The methods are validated in terms of cross-correlation coefficient between reconstructed and real image of radioactive tracer distribution using standard Derenzo-type phantom. We demonstrate that the proposed approach results in higher cross-correlation values with respect to the standard FBP method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1711.00365v1-abstract-full').style.display = 'none'; document.getElementById('1711.00365v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Presented at the 2nd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics, Krak贸w, Poland, June 4-9, 2017. To be published in Acta Phys. Pol. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Physica Polonica B Vol. 48, pp. 1611, 2017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.11369">arXiv:1710.11369</a> <span> [<a href="https://arxiv.org/pdf/1710.11369">pdf</a>, <a href="https://arxiv.org/format/1710.11369">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.48.1567">10.5506/APhysPolB.48.1567 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> J-PET: a new technology for the whole-body PET imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kisielewska-Kami%C5%84ska%2C+D">D. Kisielewska-Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.11369v1-abstract-short" style="display: inline;"> The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET built from plastic scintillators. J-PET prototype consists of 192 detection modules arranged axially in three layers forming a cylindrical diagnostic chamber with the inner diameter of 85 cm and the axial field-of-view of 50 cm. An axial arrangement of long strips of plastic scintillators, their small light attenuation, superior… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.11369v1-abstract-full').style.display = 'inline'; document.getElementById('1710.11369v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.11369v1-abstract-full" style="display: none;"> The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET built from plastic scintillators. J-PET prototype consists of 192 detection modules arranged axially in three layers forming a cylindrical diagnostic chamber with the inner diameter of 85 cm and the axial field-of-view of 50 cm. An axial arrangement of long strips of plastic scintillators, their small light attenuation, superior timing properties, and relative ease of the increase of the axial field-of-view opens promising perspectives for the cost effective construction of the whole-body PET scanner, as well as construction of MR and CT compatible PET inserts. Present status of the development of the J-PET tomograph will be presented and discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.11369v1-abstract-full').style.display = 'none'; document.getElementById('1710.11369v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Presented at the 2nd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics, Krak贸w, Poland, June 4-9, 2017. To be published in Acta Phys. Pol. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Physica Polonica B, Vol. 48, pp. 1567, 2017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.11067">arXiv:1710.11067</a> <span> [<a href="https://arxiv.org/pdf/1710.11067">pdf</a>, <a href="https://arxiv.org/format/1710.11067">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.48.1961">10.5506/APhysPolB.48.1961 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Commissioning of the J-PET detector for studies of decays of positronium atoms </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kisielewska%2C+D">D. Kisielewska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a>, <a href="/search/physics?searchtype=author&query=Shopa%2C+R+Y">R. Y. Shopa</a> , et al. (7 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.11067v2-abstract-short" style="display: inline;"> The Jagiellonian Positron Emission Tomograph (J-PET) is a detector for medical imaging of the whole human body as well as for physics studies involving detection of electron-positron annihilation into photons. J-PET has high angular and time resolution and allows for measurement of spin of the positronium and the momenta and polarization vectors of annihilation quanta. In this article, we present… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.11067v2-abstract-full').style.display = 'inline'; document.getElementById('1710.11067v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.11067v2-abstract-full" style="display: none;"> The Jagiellonian Positron Emission Tomograph (J-PET) is a detector for medical imaging of the whole human body as well as for physics studies involving detection of electron-positron annihilation into photons. J-PET has high angular and time resolution and allows for measurement of spin of the positronium and the momenta and polarization vectors of annihilation quanta. In this article, we present the potential of the J-PET system for background rejection in the decays of positronium atoms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.11067v2-abstract-full').style.display = 'none'; document.getElementById('1710.11067v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Presented at the 2nd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics, Krak贸w, Poland, June 4-9, 2017. To be published in Acta Phys. Pol. B</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.11058">arXiv:1710.11058</a> <span> [<a href="https://arxiv.org/pdf/1710.11058">pdf</a>, <a href="https://arxiv.org/format/1710.11058">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.48.1757">10.5506/APhysPolB.48.1757 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Three-dimensional image reconstruction in J-PET using Filtered Back Projection method </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Shopa%2C+R+Y">R. Y. Shopa</a>, <a href="/search/physics?searchtype=author&query=Klimaszewski%2C+K">K. Klimaszewski</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B">B. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kisielewska-Kami%C5%84ska%2C+D">D. Kisielewska-Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.11058v1-abstract-short" style="display: inline;"> We present a method and preliminary results of the image reconstruction in the Jagiellonian PET tomograph. Using GATE (Geant4 Application for Tomographic Emission), interactions of the 511 keV photons with a cylindrical detector were generated. Pairs of such photons, flying back-to-back, originate from e+e- annihilations inside a 1-mm spherical source. Spatial and temporal coordinates of hits were… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.11058v1-abstract-full').style.display = 'inline'; document.getElementById('1710.11058v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.11058v1-abstract-full" style="display: none;"> We present a method and preliminary results of the image reconstruction in the Jagiellonian PET tomograph. Using GATE (Geant4 Application for Tomographic Emission), interactions of the 511 keV photons with a cylindrical detector were generated. Pairs of such photons, flying back-to-back, originate from e+e- annihilations inside a 1-mm spherical source. Spatial and temporal coordinates of hits were smeared using experimental resolutions of the detector. We incorporated the algorithm of the 3D Filtered Back Projection, implemented in the STIR and TomoPy software packages, which differ in approximation methods. Consistent results for the Point Spread Functions of ~5/7,mm and ~9/20, mm were obtained, using STIR, for transverse and longitudinal directions, respectively, with no time of flight information included. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.11058v1-abstract-full').style.display = 'none'; document.getElementById('1710.11058v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Presented at the 2nd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics, Krak贸w, Poland, June 4-9, 2017. To be published in Acta Phys. Pol. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Physica Polonica B, Vol. 48, pp. 1757, 2017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.05611">arXiv:1710.05611</a> <span> [<a href="https://arxiv.org/pdf/1710.05611">pdf</a>, <a href="https://arxiv.org/format/1710.05611">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.12693/APhysPolA.132.1637">10.12693/APhysPolA.132.1637 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Analysis procedure of the positronium lifetime spectra for the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Zgardzinska%2C+B">B. Zgardzinska</a>, <a href="/search/physics?searchtype=author&query=Bialas%2C+P">P. Bialas</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+C+C+E">C. Curceanu E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasinska%2C+B">B. Jasinska</a>, <a href="/search/physics?searchtype=author&query=Kisielewska-Kaminska%2C+D">D. Kisielewska-Kaminska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemiez%2C+W">W. Krzemiez</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Niedzwiecka%2C+M">M. Pawlik-Niedzwiecka</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">S. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Palka%2C+M">M. Palka</a>, <a href="/search/physics?searchtype=author&query=Raczynski%2C+L">L. Raczynski</a>, <a href="/search/physics?searchtype=author&query=Raj%2C+J">J. Raj</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+S">S. Sharma</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.05611v1-abstract-short" style="display: inline;"> Positron Annihilation Lifetime Spectroscopy (PALS) has shown to be a powerful tool to study the nanostructures of porous materials. Positron Emissions Tomography (PET) are devices allowing imaging of metabolic processes e.g. in human bodies. A newly developed device, the J-PET (Jagiellonian PET), will allow PALS in addition to imaging, thus combining both analyses providing new methods for physics… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.05611v1-abstract-full').style.display = 'inline'; document.getElementById('1710.05611v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.05611v1-abstract-full" style="display: none;"> Positron Annihilation Lifetime Spectroscopy (PALS) has shown to be a powerful tool to study the nanostructures of porous materials. Positron Emissions Tomography (PET) are devices allowing imaging of metabolic processes e.g. in human bodies. A newly developed device, the J-PET (Jagiellonian PET), will allow PALS in addition to imaging, thus combining both analyses providing new methods for physics and medicine. In this contribution we present a computer program that is compatible with the J-PET software. We compare its performance with the standard program LT 9.0 by using PALS data from hexane measurements at different temperatures. Our program is based on an iterative procedure, and our fits prove that it performs as good as LT 9.0. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.05611v1-abstract-full').style.display = 'none'; document.getElementById('1710.05611v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 figures, 8 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.05598">arXiv:1710.05598</a> <span> [<a href="https://arxiv.org/pdf/1710.05598">pdf</a>, <a href="https://arxiv.org/format/1710.05598">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.12693/APhysPolA.132.1641">10.12693/APhysPolA.132.1641 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Time calibration of the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Skurzok%2C+M">M. Skurzok</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Alfs%2C+D">D. Alfs</a>, <a href="/search/physics?searchtype=author&query=Bialas%2C+P">P. Bialas</a>, <a href="/search/physics?searchtype=author&query=Shivani"> Shivani</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Glowacz%2C+B">B. Glowacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B+C">B. C. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasinska%2C+B">B. Jasinska</a>, <a href="/search/physics?searchtype=author&query=Kisielewska-Kaminska%2C+D">D. Kisielewska-Kaminska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Niedzwiecka%2C+M">M. Pawlik-Niedzwiecka</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">S. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Palka%2C+M">M. Palka</a>, <a href="/search/physics?searchtype=author&query=Raczynski%2C+L">L. Raczynski</a> , et al. (10 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.05598v1-abstract-short" style="display: inline;"> The Jagiellonian Positron Emission Tomograph (J-PET) project carried out in the Institute of Physics of the Jagiellonian University is focused on construction and tests of the first prototype of PET scanner for medical diagnostic which allows for the simultaneous 3D imaging of the whole human body using organic scintillators. The J-PET prototype consists of 192 scintillator strips forming three cy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.05598v1-abstract-full').style.display = 'inline'; document.getElementById('1710.05598v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.05598v1-abstract-full" style="display: none;"> The Jagiellonian Positron Emission Tomograph (J-PET) project carried out in the Institute of Physics of the Jagiellonian University is focused on construction and tests of the first prototype of PET scanner for medical diagnostic which allows for the simultaneous 3D imaging of the whole human body using organic scintillators. The J-PET prototype consists of 192 scintillator strips forming three cylindrical layers which are optimized for the detection of photons from the electron-positron annihilation with high time- and high angular-resolutions. In this article we present time calibration and synchronization of the whole J-PET detection system by irradiating each single detection module with a 22Na source and a small detector providing common reference time for synchronization of all the modules. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.05598v1-abstract-full').style.display = 'none'; document.getElementById('1710.05598v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted to publish in Acta Phys. Pol. A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.03565">arXiv:1707.03565</a> <span> [<a href="https://arxiv.org/pdf/1707.03565">pdf</a>, <a href="https://arxiv.org/format/1707.03565">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/12/08/P08001">10.1088/1748-0221/12/08/P08001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multichannel FPGA based MVT system for high precision time (20~ps~RMS) and charge measurement </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Strzempek%2C+P">P. Strzempek</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kajetanowicz%2C+M">M. Kajetanowicz</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohhamed%2C+M">M. Mohhamed</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a> , et al. (7 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1707.03565v1-abstract-short" style="display: inline;"> In this article it is presented an FPGA based $M$ulti-$V$oltage $T$hreshold (MVT) system which allows of sampling fast signals ($1-2$ ns rising and falling edge) in both voltage and time domain. It is possible to achieve a precision of time measurement of $20$ ps RMS and reconstruct charge of signals, using a simple approach, with deviation from real value smaller than 10$\%$. Utilization of the d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.03565v1-abstract-full').style.display = 'inline'; document.getElementById('1707.03565v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.03565v1-abstract-full" style="display: none;"> In this article it is presented an FPGA based $M$ulti-$V$oltage $T$hreshold (MVT) system which allows of sampling fast signals ($1-2$ ns rising and falling edge) in both voltage and time domain. It is possible to achieve a precision of time measurement of $20$ ps RMS and reconstruct charge of signals, using a simple approach, with deviation from real value smaller than 10$\%$. Utilization of the differential inputs of an FPGA chip as comparators together with an implementation of a TDC inside an FPGA allowed us to achieve a compact multi-channel system characterized by low power consumption and low production costs. This paper describes realization and functioning of the system comprising 192-channel TDC board and a four mezzanine cards which split incoming signals and discriminate them. The boards have been used to validate a newly developed Time-of-Flight Positron Emission Tomography system based on plastic scintillators. The achieved full system time resolution of $蟽$(TOF) $\approx 68$ ps is by factor of two better with respect to the current TOF-PET systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.03565v1-abstract-full').style.display = 'none'; document.getElementById('1707.03565v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication in JINST, 10 pages, 8 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1706.00924">arXiv:1706.00924</a> <span> [<a href="https://arxiv.org/pdf/1706.00924">pdf</a>, <a href="https://arxiv.org/format/1706.00924">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6560/aa7005">10.1088/1361-6560/aa7005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Calculation of time resolution of the J-PET tomograph using the Kernel Density Estimation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Alfs%2C+D">D. Alfs</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Curceanu%2C+C">C. Curceanu</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Hiesmayr%2C+B">B. Hiesmayr</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krawczyk%2C+N">N. Krawczyk</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a> , et al. (9 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1706.00924v2-abstract-short" style="display: inline;"> In this paper we estimate the time resolution of the J-PET scanner built from plastic scintillators. We incorporate the method of signal processing using the Tikhonov regularization framework and the Kernel Density Estimation method. We obtain simple, closed-form analytical formulas for time resolutions. The proposed method is validated using signals registered by means of the single detection uni… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.00924v2-abstract-full').style.display = 'inline'; document.getElementById('1706.00924v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1706.00924v2-abstract-full" style="display: none;"> In this paper we estimate the time resolution of the J-PET scanner built from plastic scintillators. We incorporate the method of signal processing using the Tikhonov regularization framework and the Kernel Density Estimation method. We obtain simple, closed-form analytical formulas for time resolutions. The proposed method is validated using signals registered by means of the single detection unit of the J-PET tomograph built out from 30 cm long plastic scintillator strip. It is shown that the experimental and theoretical results, obtained for the J-PET scanner equipped with vacuum tube photomultipliers, are consistent. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.00924v2-abstract-full').style.display = 'none'; document.getElementById('1706.00924v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 June, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">25 pages, 11 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Med. Biol. 62 (2017) 5076-5097 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.07528">arXiv:1602.07528</a> <span> [<a href="https://arxiv.org/pdf/1602.07528">pdf</a>, <a href="https://arxiv.org/format/1602.07528">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2016.02.069">10.1016/j.nima.2016.02.069 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Trilateration-based reconstruction of ortho-positronium decays into three photons with the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Alfs%2C+D">D. Alfs</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.07528v1-abstract-short" style="display: inline;"> This work reports on a new reconstruction algorithm allowing to reconstruct the decays of ortho-positronium atoms into three photons using the places and times of photons recorded in the detector. The method is based on trilateration and allows for a simultaneous reconstruction of both location and time of the decay. Results of resolution tests of the new reconstruction in the J-PET detector based… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.07528v1-abstract-full').style.display = 'inline'; document.getElementById('1602.07528v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.07528v1-abstract-full" style="display: none;"> This work reports on a new reconstruction algorithm allowing to reconstruct the decays of ortho-positronium atoms into three photons using the places and times of photons recorded in the detector. The method is based on trilateration and allows for a simultaneous reconstruction of both location and time of the decay. Results of resolution tests of the new reconstruction in the J-PET detector based on Monte Carlo simulations are presented, which yield a spatial resolution at the level of 2 cm (FWHM) for X and Y and at the level of 1 cm (FWHM) for Z available with the present resolution of J-PET after application of a kinematic fit. Prospects of employment of this method for studying angular correlations of photons in decays of polarized ortho-positronia for the needs of tests of CP and CPT discrete symmetries are also discussed. The new reconstruction method allows for discrimination of background from random three-photon coincidences as well as for application of a novel method for determination of the linear polarization of ortho-positronium atoms, which is also introduced in this work. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.07528v1-abstract-full').style.display = 'none'; document.getElementById('1602.07528v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 5 figures. Accepted for publication in Nuclear Instrumentation and Methods in Physics Research A</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.05402">arXiv:1602.05402</a> <span> [<a href="https://arxiv.org/pdf/1602.05402">pdf</a>, <a href="https://arxiv.org/format/1602.05402">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.47.549">10.5506/APhysPolB.47.549 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Scatter fraction of the J-PET tomography scanner </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Alfs%2C+D">D. Alfs</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+J">J. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammad%2C+M">M. Mohammad</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">A. Wieczorek</a>, <a href="/search/physics?searchtype=author&query=Zgardzi%C5%84ska%2C+B">B. Zgardzi艅ska</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.05402v1-abstract-short" style="display: inline;"> A novel Positron Emission Tomography system, based on plastic scintillators, is being developed by the J-PET collaboration. In this article we present the simulation results of the scatter fraction, representing one of the parameters crucial for background studies defined in the NEMA-NU-2-2012 norm. We elaborate an event selection methods allowing to suppress events in which gamma quanta were scat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05402v1-abstract-full').style.display = 'inline'; document.getElementById('1602.05402v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.05402v1-abstract-full" style="display: none;"> A novel Positron Emission Tomography system, based on plastic scintillators, is being developed by the J-PET collaboration. In this article we present the simulation results of the scatter fraction, representing one of the parameters crucial for background studies defined in the NEMA-NU-2-2012 norm. We elaborate an event selection methods allowing to suppress events in which gamma quanta were scattered in the phantom or underwent the multiple scattering in the detector. The estimated scatter fraction for the single-layer J-PET scanner varies from 37% to 53% depending on the applied energy threshold. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05402v1-abstract-full').style.display = 'none'; document.getElementById('1602.05402v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.05376">arXiv:1602.05376</a> <span> [<a href="https://arxiv.org/pdf/1602.05376">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.47.453">10.5506/APhysPolB.47.453 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Determination of the 3纬fraction from positron annihilation in mesoporous materials for symmetry violation experiment with J-PET scanner </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Wiertel%2C+M">M. Wiertel</a>, <a href="/search/physics?searchtype=author&query=Zaleski%2C+R">R. Zaleski</a>, <a href="/search/physics?searchtype=author&query=Alfs%2C+D">D. Alfs</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.05376v1-abstract-short" style="display: inline;"> Various mesoporous materials were investigated to choose the best material for experiments requiring high yield of long-lived positronium. We found that the fraction of 3纬annihilation determined using 纬-ray energy spectra and positron annihilation lifetime spectra (PAL) changed from 20% to 25%. The 3gamma fraction and o-Ps formation probability in the polymer XAD-4 is found to be the largest. Elem… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05376v1-abstract-full').style.display = 'inline'; document.getElementById('1602.05376v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.05376v1-abstract-full" style="display: none;"> Various mesoporous materials were investigated to choose the best material for experiments requiring high yield of long-lived positronium. We found that the fraction of 3纬annihilation determined using 纬-ray energy spectra and positron annihilation lifetime spectra (PAL) changed from 20% to 25%. The 3gamma fraction and o-Ps formation probability in the polymer XAD-4 is found to be the largest. Elemental analysis performed using scanning electron microscop (SEM) equipped with energy-dispersive X-ray spectroscop EDS show high purity of the investigated materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05376v1-abstract-full').style.display = 'none'; document.getElementById('1602.05376v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 2 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.05251">arXiv:1602.05251</a> <span> [<a href="https://arxiv.org/pdf/1602.05251">pdf</a>, <a href="https://arxiv.org/format/1602.05251">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.5506/APhysPolB.47.491">10.5506/APhysPolB.47.491 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sampling FEE and Trigger-less DAQ for the J-PET Scanner </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Alfs%2C+D">D. Alfs</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Dulski%2C+K">K. Dulski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=G%C5%82owacz%2C+B">B. G艂owacz</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Mohammed%2C+M">M. Mohammed</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a> , et al. (7 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.05251v1-abstract-short" style="display: inline;"> In this paper, we present a complete Data Acquisition System (DAQ) together with the readout mechanisms for the J-PET tomography scanner. In general detector readout chain is constructed out of Front-End Electronics (FEE), measurement devices like Time-to-Digital or Analog-to-Digital Converters (TDCs or ADCs), data collectors and storage. We have developed a system capable for maintaining continuo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05251v1-abstract-full').style.display = 'inline'; document.getElementById('1602.05251v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.05251v1-abstract-full" style="display: none;"> In this paper, we present a complete Data Acquisition System (DAQ) together with the readout mechanisms for the J-PET tomography scanner. In general detector readout chain is constructed out of Front-End Electronics (FEE), measurement devices like Time-to-Digital or Analog-to-Digital Converters (TDCs or ADCs), data collectors and storage. We have developed a system capable for maintaining continuous readout of digitized data without preliminary selection. Such operation mode results in up to 8 Gbps data stream, therefore it is required to introduce a dedicated module for online event building and feature extraction. The Central Controller Module, equipped with Xilinx Zynq SoC and 16 optical transceivers serves as such true real time computing facility. Our solution for the continuous data recording (trigger-less) is a novel approach in such detector systems and assures that most of the information is preserved on the storage for further, high-level processing. Signal discrimination applies an unique method of using LVDS buffers located in the FPGA fabric. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05251v1-abstract-full').style.display = 'none'; document.getElementById('1602.05251v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 1 figure</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.02058">arXiv:1602.02058</a> <span> [<a href="https://arxiv.org/pdf/1602.02058">pdf</a>, <a href="https://arxiv.org/format/1602.02058">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/0031-9155/61/5/2025">10.1088/0031-9155/61/5/2025 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Time resolution of the plastic scintillator strips with matrix photomultiplier readout for J-PET tomograph </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Alfs%2C+D">D. Alfs</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Giergiel%2C+K">K. Giergiel</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.02058v2-abstract-short" style="display: inline;"> Recent tests of a single module of the Jagiellonian Positron Emission Tomography system (J-PET) consisting of 30 cm long plastic scintillator strips have proven its applicability for the detection of annihilation quanta (0.511 MeV) with a coincidence resolving time (CRT) of 0.266 ns. The achieved resolution is almost by a factor of two better with respect to the current TOF-PET detectors and it ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.02058v2-abstract-full').style.display = 'inline'; document.getElementById('1602.02058v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.02058v2-abstract-full" style="display: none;"> Recent tests of a single module of the Jagiellonian Positron Emission Tomography system (J-PET) consisting of 30 cm long plastic scintillator strips have proven its applicability for the detection of annihilation quanta (0.511 MeV) with a coincidence resolving time (CRT) of 0.266 ns. The achieved resolution is almost by a factor of two better with respect to the current TOF-PET detectors and it can still be improved since, as it is shown in this article, the intrinsic limit of time resolution for the determination of time of the interaction of 0.511 MeV gamma quanta in plastic scintillators is much lower. As the major point of the article, a method allowing to record timestamps of several photons, at two ends of the scintillator strip, by means of matrix of silicon photomultipliers (SiPM) is introduced. As a result of simulations, conducted with the number of SiPM varying from 4 to 42, it is shown that the improvement of timing resolution saturates with the growing number of photomultipliers, and that the 2 x 5 configuration at two ends allowing to read twenty timestamps, constitutes an optimal solution. The conducted simulations accounted for the emission time distribution, photon transport and absorption inside the scintillator, as well as quantum efficiency and transit time spread of photosensors, and were checked based on the experimental results. Application of the 2 x 5 matrix of SiPM allows for achieving the coincidence resolving time in positron emission tomography of $\approx$ 0.170 ns for 15 cm axial field-of-view (AFOV) and $\approx$ 0.365 ns for 100 cm AFOV. The results open perspectives for construction of a cost-effective TOF-PET scanner with significantly better TOF resolution and larger AFOV with respect to the current TOF-PET modalities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.02058v2-abstract-full').style.display = 'none'; document.getElementById('1602.02058v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">To be published in Phys. Med. Biol. (26 pages, 17 figures)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Med. Biol. 61 (2016) 2025 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.01114">arXiv:1509.01114</a> <span> [<a href="https://arxiv.org/pdf/1509.01114">pdf</a>, <a href="https://arxiv.org/format/1509.01114">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/nuka-2015-0131">10.1515/nuka-2015-0131 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Searches for discrete symmetries violation in ortho-positronium decay using the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">A. Wieczorek</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+M">M. Zieli艅ski</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1509.01114v1-abstract-short" style="display: inline;"> In this paper we present prospects for using the J-PET detector to search for discrete symmetries violations in a purely leptonic system of the positronium atom. We discuss tests of CP and CPT symmetries by means of ortho-positronium decays into three photons. No zero expectation values for chosen correlations between ortho-positronium spin and momentum vectors of photons would imply the existence… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.01114v1-abstract-full').style.display = 'inline'; document.getElementById('1509.01114v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.01114v1-abstract-full" style="display: none;"> In this paper we present prospects for using the J-PET detector to search for discrete symmetries violations in a purely leptonic system of the positronium atom. We discuss tests of CP and CPT symmetries by means of ortho-positronium decays into three photons. No zero expectation values for chosen correlations between ortho-positronium spin and momentum vectors of photons would imply the existence of physics phenomena beyond the Standard Model. Previous measurements resulted in violation amplitude parameters for CP and CPT symmetries consistent with zero, with an uncertainty of about 10-3. The J-PET detector allows to determine those values with better precision thanks to a unique time and angular esolution combined with a high geometrical acceptance. Achieving the aforementioned is possible due to application of polymer scintillators instead of crystals as detectors of annihilation quanta. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.01114v1-abstract-full').style.display = 'none'; document.getElementById('1509.01114v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">in Nukleonika 2015</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nukleonika 60(4) (2015) 729-732 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.00411">arXiv:1509.00411</a> <span> [<a href="https://arxiv.org/pdf/1509.00411">pdf</a>, <a href="https://arxiv.org/format/1509.00411">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Other Quantitative Biology">q-bio.OT</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/nuka-2015-0135">10.1515/nuka-2015-0135 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Studies of unicellular micro-organisms Saccharomyces cerevisiae by means of Positron Annihilation Lifetime Spectroscopy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Zgardzi%C5%84ska%2C+B">B. Zgardzi艅ska</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rajfur%2C+Z">Z. Rajfur</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1509.00411v1-abstract-short" style="display: inline;"> Results of Positron Annihilation Lifetime Spectroscopy (PALS) and microscopic studies on simple microorganisms: brewing yeasts are presented. Lifetime of ortho - positronium (o-Ps) were found to change from 2.4 to 2.9 ns (longer lived component) for lyophilised and aqueous yeasts, respectively. Also hygroscopicity of yeasts in time was examined, allowing to check how water - the main component of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.00411v1-abstract-full').style.display = 'inline'; document.getElementById('1509.00411v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.00411v1-abstract-full" style="display: none;"> Results of Positron Annihilation Lifetime Spectroscopy (PALS) and microscopic studies on simple microorganisms: brewing yeasts are presented. Lifetime of ortho - positronium (o-Ps) were found to change from 2.4 to 2.9 ns (longer lived component) for lyophilised and aqueous yeasts, respectively. Also hygroscopicity of yeasts in time was examined, allowing to check how water - the main component of the cell - affects PALS parameters, thus lifetime of o-Ps were found to change from 1.2 to 1.4 ns (shorter lived component) for the dried yeasts. The time sufficient to hydrate the cells was found below 10 hours. In the presence of liquid water an indication of reorganization of yeast in the molecular scale was observed. Microscopic images of the lyophilised, dried and wet yeasts with best possible resolution were obtained using Inverted Microscopy (IM) and Environmental Scanning Electron Microscopy (ESEM) methods. As a result visible changes to the surface of the cell membrane were observed in ESEM images. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.00411v1-abstract-full').style.display = 'none'; document.getElementById('1509.00411v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Nukleonika (2015)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nukleonika 60(4) (2015) 749-753 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.07463">arXiv:1508.07463</a> <span> [<a href="https://arxiv.org/pdf/1508.07463">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/nuka-2015-0138">10.1515/nuka-2015-0138 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reconstruction of hit-time and hit-position of annihilation quanta in the J-PET detector using the Mahalanobis distance </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">A. Wieczorek</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+M">M. Zieli艅ski</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1508.07463v1-abstract-short" style="display: inline;"> The J-PET detector being developed at Jagiellonian University, is a Positron Emission Tomograph composed of the long strips of polymer scintillators. At the same time it is a detector system which will be used for studies of the decays of positronium atoms. The shape of photomultiplier signals depends on the hit-time and hit-position of the gamma quantum. In order to take advantage of this fact a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.07463v1-abstract-full').style.display = 'inline'; document.getElementById('1508.07463v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.07463v1-abstract-full" style="display: none;"> The J-PET detector being developed at Jagiellonian University, is a Positron Emission Tomograph composed of the long strips of polymer scintillators. At the same time it is a detector system which will be used for studies of the decays of positronium atoms. The shape of photomultiplier signals depends on the hit-time and hit-position of the gamma quantum. In order to take advantage of this fact a dedicated sampling front-end electronics which enables to sample signals in voltage domain with the time precision of about 20 ps and novel reconstruction method based on the comparison of examined signal with the model signals stored in the library has been developed. As a measure of the similarity we use the Mahalanobis distance. The achievable position and time-resolution depends on number and values of the threshold levels at which the signal is sampled. A reconstruction method, as well as preliminary results are presented and discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.07463v1-abstract-full').style.display = 'none'; document.getElementById('1508.07463v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nukleonika 60(4) (2015) 765-769 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.06820">arXiv:1508.06820</a> <span> [<a href="https://arxiv.org/pdf/1508.06820">pdf</a>, <a href="https://arxiv.org/format/1508.06820">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/nuka-2015-0140">10.1515/nuka-2015-0140 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">A. Wieczorek</a>, <a href="/search/physics?searchtype=author&query=Zgardzi%C5%84ska%2C+B">B. Zgardzi艅ska</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1508.06820v1-abstract-short" style="display: inline;"> The polystyrene dopped with 2,5-diphenyloxazole as a primary fluor and 2-(4-styrylphenyl)benzoxazole as a wavelength shifter, prepared as a plastic scintillator was investigated using positronium probe in wide range of temperatures from 123 to 423 K. Three structural transitions at 260 K, 283 K and 370 K were found in the material. In the o-Ps intensity dependence on temperature, the significant h… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.06820v1-abstract-full').style.display = 'inline'; document.getElementById('1508.06820v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.06820v1-abstract-full" style="display: none;"> The polystyrene dopped with 2,5-diphenyloxazole as a primary fluor and 2-(4-styrylphenyl)benzoxazole as a wavelength shifter, prepared as a plastic scintillator was investigated using positronium probe in wide range of temperatures from 123 to 423 K. Three structural transitions at 260 K, 283 K and 370 K were found in the material. In the o-Ps intensity dependence on temperature, the significant hysteresis is observed. Heated to 370 K, the material exhibits the o-Ps intensity variations in time. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.06820v1-abstract-full').style.display = 'none'; document.getElementById('1508.06820v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">in Nukleonika 2015</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nukleonika 60(4) (2015) 777-781 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.02751">arXiv:1508.02751</a> <span> [<a href="https://arxiv.org/pdf/1508.02751">pdf</a>, <a href="https://arxiv.org/ps/1508.02751">ps</a>, <a href="https://arxiv.org/format/1508.02751">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/nuka-2015-0134">10.1515/nuka-2015-0134 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Processing optimization with parallel computing for the J-PET tomography scanner </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Ba%C5%82a%2C+M">M. Ba艂a</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gorgol%2C+M">M. Gorgol</a>, <a href="/search/physics?searchtype=author&query=Jasi%C5%84ska%2C+B">B. Jasi艅ska</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Stola%2C+K">K. Stola</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Trybek%2C+D">D. Trybek</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1508.02751v1-abstract-short" style="display: inline;"> The Jagiellonian-PET (J-PET) collaboration is developing a prototype TOF-PET detector based on long polymer scintillators. This novel approach exploits the excellent time properties of the plastic scintillators, which permit very precise time measurements. The very fast, FPGA-based front-end electronics and the data acquisition system, as well as, low- and high-level reconstruction algorithms were… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.02751v1-abstract-full').style.display = 'inline'; document.getElementById('1508.02751v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.02751v1-abstract-full" style="display: none;"> The Jagiellonian-PET (J-PET) collaboration is developing a prototype TOF-PET detector based on long polymer scintillators. This novel approach exploits the excellent time properties of the plastic scintillators, which permit very precise time measurements. The very fast, FPGA-based front-end electronics and the data acquisition system, as well as, low- and high-level reconstruction algorithms were specially developed to be used with the J-PET scanner. The TOF-PET data processing and reconstruction are time and resource demanding operations, especially in case of a large acceptance detector, which works in triggerless data acquisition mode. In this article, we discuss the parallel computing methods applied to optimize the data processing for the J-PET detector. We begin with general concepts of parallel computing and then we discuss several applications of those techniques in the J-PET data processing. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.02751v1-abstract-full').style.display = 'none'; document.getElementById('1508.02751v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> NUKLEONIKA 2015 60 (4) 745 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1507.03799">arXiv:1507.03799</a> <span> [<a href="https://arxiv.org/pdf/1507.03799">pdf</a>, <a href="https://arxiv.org/format/1507.03799">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/nuka-2016-0012">10.1515/nuka-2016-0012 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Application of the Compress Sensing Theory for Improvement of the TOF Resolution in a Novel J-PET Instrument </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raczynski%2C+L">L. Raczynski</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Wislicki%2C+W">W. Wislicki</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bialas%2C+P">P. Bialas</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">Sz. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Palka%2C+M">M. Palka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Slomski%2C+A">A. Slomski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">A. Wieczorek</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1507.03799v2-abstract-short" style="display: inline;"> Nowadays, in Positron Emission Tomography (PET) systems, a Time of Flight information is used to improve the image reconstruction process. In Time of Flight PET (TOF-PET), fast detectors are able to measure the difference in the arrival time of the two gamma rays, with the precision enabling to shorten significantly a range along the line-of-response (LOR) where the annihilation occurred. In the n… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.03799v2-abstract-full').style.display = 'inline'; document.getElementById('1507.03799v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1507.03799v2-abstract-full" style="display: none;"> Nowadays, in Positron Emission Tomography (PET) systems, a Time of Flight information is used to improve the image reconstruction process. In Time of Flight PET (TOF-PET), fast detectors are able to measure the difference in the arrival time of the two gamma rays, with the precision enabling to shorten significantly a range along the line-of-response (LOR) where the annihilation occurred. In the new concept, called J-PET scanner, gamma rays are detected in plastic scintillators. In a single strip of J-PET system, time values are obtained by probing signals in the amplitude domain. Owing to Compress Sensing theory, information about the shape and amplitude of the signals is recovered. In this paper we demonstrate that based on the acquired signals parameters, a better signal normalization may be provided in order to improve the TOF resolution. The procedure was tested using large sample of data registered by a dedicated detection setup enabling sampling of signals with 50 ps intervals. Experimental setup provided irradiation of a chosen position in the plastic scintillator strip with annihilation gamma quanta. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.03799v2-abstract-full').style.display = 'none'; document.getElementById('1507.03799v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nukleonika 61, (2016) 35-39 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.06889">arXiv:1504.06889</a> <span> [<a href="https://arxiv.org/pdf/1504.06889">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/bams-2013-0106">10.1515/bams-2013-0106 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> 3D PET image reconstruction based on Maximum Likelihood Estimation Method (MLEM) algorithm </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">Artur S艂omski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Zbigniew Rudy</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">Tomasz Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">Piotr Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">Eryk Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁ukasz Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">Andrzej Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">Grzegorz Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">Jakub Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">Pawe艂 Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">Tomasz Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">Wojciech Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">Marcin Molenda</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">Pawe艂 Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Szymon Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">Marek Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik%2C+M">Monika Pawlik</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">Lech Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">Piotr Salabura</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">Neha Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">Micha艂 Silarski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">Jerzy Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">Adam Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">Wojciech Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+M">Marcin Zieli艅ski</a> , et al. (1 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.06889v1-abstract-short" style="display: inline;"> Positron emission tomographs (PET) do not measure an image directly. Instead, they measure at the boundary of the field-of-view (FOV) of PET tomograph a sinogram that consists of measurements of the sums of all the counts along the lines connecting two detectors. As there is a multitude of detectors build-in typical PET tomograph structure, there are many possible detector pairs that pertain to th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.06889v1-abstract-full').style.display = 'inline'; document.getElementById('1504.06889v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.06889v1-abstract-full" style="display: none;"> Positron emission tomographs (PET) do not measure an image directly. Instead, they measure at the boundary of the field-of-view (FOV) of PET tomograph a sinogram that consists of measurements of the sums of all the counts along the lines connecting two detectors. As there is a multitude of detectors build-in typical PET tomograph structure, there are many possible detector pairs that pertain to the measurement. The problem is how to turn this measurement into an image (this is called imaging). Decisive improvement in PET image quality was reached with the introduction of iterative reconstruction techniques. This stage was reached already twenty years ago (with the advent of new powerful computing processors). However, three dimensional (3D) imaging remains still a challenge. The purpose of the image reconstruction algorithm is to process this imperfect count data for a large number (many millions) of lines-of-responce (LOR) and millions of detected photons to produce an image showing the distribution of the labeled molecules in space. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.06889v1-abstract-full').style.display = 'none'; document.getElementById('1504.06889v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Bio-Algorithms and Med-Systems 10(1), 1-7 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1504.06886">arXiv:1504.06886</a> <span> [<a href="https://arxiv.org/pdf/1504.06886">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/bams-2013-0108">10.1515/bams-2013-0108 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Plastic scintillators for positron emission tomography obtained by the bulk polymerization method </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁ukasz Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">Andrzej Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">Marcin Molenda</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">Pawe艂 Moskal</a>, <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">Anna Wieczorek</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">Tomasz Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">Piotr Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">Eryk Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">Grzegorz Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">Jakub Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">Pawe艂 Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">Tomasz Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">Wojciech Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Szymon Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">Marek Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik%2C+M">Monika Pawlik</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">Lech Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Zbigniew Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">Piotr Salabura</a>, <a href="/search/physics?searchtype=author&query=Gupta-Sharma%2C+N">Neha Gupta-Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">Micha艂 Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">Artur S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">Jerzy Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">Adam Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">Wojciech Wi艣licki</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1504.06886v1-abstract-short" style="display: inline;"> This paper describes three methods regarding the production of plastic scintillators. One method appears to be suitable for the manufacturing of plastic scintillator, revealing properties which fulfill the requirements of novel positron emission tomography scanners based on plastic scintillators. The key parameters of the manufacturing process are determined and discussed. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1504.06886v1-abstract-full" style="display: none;"> This paper describes three methods regarding the production of plastic scintillators. One method appears to be suitable for the manufacturing of plastic scintillator, revealing properties which fulfill the requirements of novel positron emission tomography scanners based on plastic scintillators. The key parameters of the manufacturing process are determined and discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1504.06886v1-abstract-full').style.display = 'none'; document.getElementById('1504.06886v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Bio-Algorithms and Med-Systems 10(1), 27-31 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.05188">arXiv:1503.05188</a> <span> [<a href="https://arxiv.org/pdf/1503.05188">pdf</a>, <a href="https://arxiv.org/format/1503.05188">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2015.03.032">10.1016/j.nima.2015.03.032 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Compressive Sensing of Signals Generated in Plastic Scintillators in a Novel J-PET Instrument </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raczynski%2C+L">L. Raczynski</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Wislicki%2C+W">W. Wislicki</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bialas%2C+P">P. Bialas</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L">L. Kaplon</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">Sz. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Palka%2C+M">M. Palka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=lomski%2C+A+S">A. S lomski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1503.05188v3-abstract-short" style="display: inline;"> The J-PET scanner, which allows for single bed imaging of the whole human body, is currently under development at the Jagiellonian University. The dis- cussed detector offers improvement of the Time of Flight (TOF) resolution due to the use of fast plastic scintillators and dedicated electronics allowing for sam- pling in the voltage domain of signals with durations of few nanoseconds. In this pap… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05188v3-abstract-full').style.display = 'inline'; document.getElementById('1503.05188v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.05188v3-abstract-full" style="display: none;"> The J-PET scanner, which allows for single bed imaging of the whole human body, is currently under development at the Jagiellonian University. The dis- cussed detector offers improvement of the Time of Flight (TOF) resolution due to the use of fast plastic scintillators and dedicated electronics allowing for sam- pling in the voltage domain of signals with durations of few nanoseconds. In this paper we show that recovery of the whole signal, based on only a few samples, is possible. In order to do that, we incorporate the training signals into the Tikhonov regularization framework and we perform the Principal Component Analysis decomposition, which is well known for its compaction properties. The method yields a simple closed form analytical solution that does not require iter- ative processing. Moreover, from the Bayes theory the properties of regularized solution, especially its covariance matrix, may be easily derived. This is the key to introduce and prove the formula for calculations of the signal recovery error. In this paper we show that an average recovery error is approximately inversely proportional to the number of acquired samples. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05188v3-abstract-full').style.display = 'none'; document.getElementById('1503.05188v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.00465">arXiv:1503.00465</a> <span> [<a href="https://arxiv.org/pdf/1503.00465">pdf</a>, <a href="https://arxiv.org/ps/1503.00465">ps</a>, <a href="https://arxiv.org/format/1503.00465">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.12693/APhysPolA.127.1491">10.12693/APhysPolA.127.1491 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Analysis framework for the J-PET scanner </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gruntowski%2C+A">A. Gruntowski</a>, <a href="/search/physics?searchtype=author&query=Stola%2C+K">K. Stola</a>, <a href="/search/physics?searchtype=author&query=Trybek%2C+D">D. Trybek</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+L">L. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1503.00465v2-abstract-short" style="display: inline;"> J-PET analysis framework is a flexible, lightweight, ROOT-based software package which provides the tools to develop reconstruction and calibration procedures for PET tomography. In this article we present the implementation of the full data-processing chain in the J-PET framework which is used for the data analysis of the J-PET tomography scanner. The Framework incorporates automated handling of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.00465v2-abstract-full').style.display = 'inline'; document.getElementById('1503.00465v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.00465v2-abstract-full" style="display: none;"> J-PET analysis framework is a flexible, lightweight, ROOT-based software package which provides the tools to develop reconstruction and calibration procedures for PET tomography. In this article we present the implementation of the full data-processing chain in the J-PET framework which is used for the data analysis of the J-PET tomography scanner. The Framework incorporates automated handling of PET setup parameters' database as well as high level tools for building data reconstruction procedures. Each of these components is briefly discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.00465v2-abstract-full').style.display = 'none'; document.getElementById('1503.00465v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 1 figure</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Phys. Pol. A 127 (2015) 1491-1494 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.07886">arXiv:1502.07886</a> <span> [<a href="https://arxiv.org/pdf/1502.07886">pdf</a>, <a href="https://arxiv.org/format/1502.07886">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.12693/APhysPolA.127.1495">10.12693/APhysPolA.127.1495 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Hit time and hit position reconstruction in the J-PET detector based on a library of averaged model signals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Bu%C5%82ka%2C+J">J. Bu艂ka</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+L">L. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1502.07886v2-abstract-short" style="display: inline;"> In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors amplitude and shape of registered signals depends strongly on the position where particle hit the detector. The reconstruction is based on determination of the degree of similarity between measured and averaged signals s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.07886v2-abstract-full').style.display = 'inline'; document.getElementById('1502.07886v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.07886v2-abstract-full" style="display: none;"> In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors amplitude and shape of registered signals depends strongly on the position where particle hit the detector. The reconstruction is based on determination of the degree of similarity between measured and averaged signals stored in a library for a set of well-defined positions along the scintillator. Preliminary results of validation of the introduced method with experimental data obtained by means of the double strip prototype of the J-PET detector are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.07886v2-abstract-full').style.display = 'none'; document.getElementById('1502.07886v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Phys. Polon. A 127 (2015) 1495-1499 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.07478">arXiv:1502.07478</a> <span> [<a href="https://arxiv.org/pdf/1502.07478">pdf</a>, <a href="https://arxiv.org/format/1502.07478">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.12693/APhysPolA.127.1500">10.12693/APhysPolA.127.1500 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> GPU accelerated image reconstruction in a two-strip J-PET tomograph </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1502.07478v2-abstract-short" style="display: inline;"> We present a fast GPU implementation of the image reconstruction routine, for a novel two strip PET detector that relies solely on the time of flight measurements. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.07478v2-abstract-full" style="display: none;"> We present a fast GPU implementation of the image reconstruction routine, for a novel two strip PET detector that relies solely on the time of flight measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.07478v2-abstract-full').style.display = 'none'; document.getElementById('1502.07478v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Phys. Polon. A 127 (2015) 1500-1504 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.04532">arXiv:1502.04532</a> <span> [<a href="https://arxiv.org/pdf/1502.04532">pdf</a>, <a href="https://arxiv.org/format/1502.04532">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.12693/APhysPolA.127.1505">10.12693/APhysPolA.127.1505 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Multiple scattering and accidental coincidences in the J-PET detector simulated using GATE package </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Bu%C5%82ka%2C+J">J. Bu艂ka</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gruntowski%2C+A">A. Gruntowski</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a> , et al. (6 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1502.04532v2-abstract-short" style="display: inline;"> Novel Positron Emission Tomography system, based on plastic scintillators, is developed by the J-PET collaboration. In order to optimize geometrical configuration of built device, advanced computer simulations are performed. Detailed study is presented of background given by accidental coincidences and multiple scattering of gamma quanta. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.04532v2-abstract-full" style="display: none;"> Novel Positron Emission Tomography system, based on plastic scintillators, is developed by the J-PET collaboration. In order to optimize geometrical configuration of built device, advanced computer simulations are performed. Detailed study is presented of background given by accidental coincidences and multiple scattering of gamma quanta. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.04532v2-abstract-full').style.display = 'none'; document.getElementById('1502.04532v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 16 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Phys. Pol A127 (2015) 1505-1512 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.02901">arXiv:1502.02901</a> <span> [<a href="https://arxiv.org/pdf/1502.02901">pdf</a>, <a href="https://arxiv.org/format/1502.02901">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.12693/APhysPolA.127.1487">10.12693/APhysPolA.127.1487 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A pilot study of the novel J-PET plastic scintillator with 2-(4-styrylphenyl)benzoxazole as a wavelength shifter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">A. Wieczorek</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Danel%2C+A">A. Danel</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Gruntowski%2C+A">A. Gruntowski</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">M. Molenda</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a> , et al. (8 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1502.02901v3-abstract-short" style="display: inline;"> For the first time a molecule of 2-(4-styrylphenyl)benzoxazole containing benzoxazole and stilbene groups is applied as a scintillator dopant acting as a wavelength shifter. In this article a light yield of the plastic scintillator, prepared from styrene doped with 2 wt% of 2,5-diphenylbenzoxazole and 0.03 wt% of 2-(4-styrylphenyl)benzoxazole, is determined to be as large as 60% $\pm$ 2% of the an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.02901v3-abstract-full').style.display = 'inline'; document.getElementById('1502.02901v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.02901v3-abstract-full" style="display: none;"> For the first time a molecule of 2-(4-styrylphenyl)benzoxazole containing benzoxazole and stilbene groups is applied as a scintillator dopant acting as a wavelength shifter. In this article a light yield of the plastic scintillator, prepared from styrene doped with 2 wt% of 2,5-diphenylbenzoxazole and 0.03 wt% of 2-(4-styrylphenyl)benzoxazole, is determined to be as large as 60% $\pm$ 2% of the anthracene light output. There is a potential to improve this value in the future by the optimization of the additives concentrations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.02901v3-abstract-full').style.display = 'none'; document.getElementById('1502.02901v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Acta Phys. Pol A127 (2015) 1487-1490 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1412.6963">arXiv:1412.6963</a> <span> [<a href="https://arxiv.org/pdf/1412.6963">pdf</a>, <a href="https://arxiv.org/format/1412.6963">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2014.12.005">10.1016/j.nima.2014.12.005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A novel method for the line-of-response and time-of-flight reconstruction in TOF-PET detectors based on a library of synchronized model signals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Zo%C5%84%2C+N">N. Zo艅</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kami%C5%84ska%2C+D">D. Kami艅ska</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Rundel%2C+O">O. Rundel</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1412.6963v2-abstract-short" style="display: inline;"> A novel method of hit time and hit position reconstruction in scintillator detectors is described. The method is based on comparison of detector signals with results stored in a library of synchronized model signals registered for a set of well-defined positions of scintillation points. The hit position is reconstructed as the one corresponding to the signal from the library which is most similar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.6963v2-abstract-full').style.display = 'inline'; document.getElementById('1412.6963v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1412.6963v2-abstract-full" style="display: none;"> A novel method of hit time and hit position reconstruction in scintillator detectors is described. The method is based on comparison of detector signals with results stored in a library of synchronized model signals registered for a set of well-defined positions of scintillation points. The hit position is reconstructed as the one corresponding to the signal from the library which is most similar to the measurement signal. The time of the interaction is determined as a relative time between the measured signal and the most similar one in the library. A degree of similarity of measured and model signals is defined as the distance between points representing the measurement- and model-signal in the multi-dimensional measurement space. Novelty of the method lies also in the proposed way of synchronization of model signals enabling direct determination of the difference between time-of-flights (TOF) of annihilation quanta from the annihilation point to the detectors. The introduced method was validated using experimental data obtained by means of the double strip prototype of the J-PET detector and $^{22}$Na sodium isotope as a source of annihilation gamma quanta.The detector was built out from plastic scintillator strips with dimensions of 5 mm x 19 mm x 300 mm, optically connected at both sides to photomultipliers,from which signals were sampled by means of the Serial Data Analyzer.Using the introduced method, the spatial and TOF resolution of about 1.3 cm ($蟽$) and 125 ps ($蟽$) were established, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1412.6963v2-abstract-full').style.display = 'none'; document.getElementById('1412.6963v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 December, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Inst. and Methods in Physics Research A 775 (2015), 54-62 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1407.8293">arXiv:1407.8293</a> <span> [<a href="https://arxiv.org/pdf/1407.8293">pdf</a>, <a href="https://arxiv.org/format/1407.8293">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2014.07.032">10.1016/j.nima.2014.07.032 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Novel method for hit-position reconstruction using voltage signals in plastic scintillators and its application to Positron Emission Tomography </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Raczynski%2C+L">L. Raczynski</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Wislicki%2C+W">W. Wislicki</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bialas%2C+P">P. Bialas</a>, <a href="/search/physics?searchtype=author&query=Czerwinski%2C+E">E. Czerwinski</a>, <a href="/search/physics?searchtype=author&query=Kaplon%2C+L+.">L . Kaplon</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemien%2C+W">W. Krzemien</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">M. Molenda</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+I">I. Moskal</a>, <a href="/search/physics?searchtype=author&query=Niedzwiecki%2C+S">Sz. Niedzwiecki</a>, <a href="/search/physics?searchtype=author&query=Palka%2C+M">M. Palka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Niedzwiecka%2C+M">M. Pawlik-Niedzwiecka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Slomski%2C+A">A. Slomski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1407.8293v1-abstract-short" style="display: inline;"> Currently inorganic scintillator detectors are used in all commercial Time of Flight Positron Emission Tomograph (TOF-PET) devices. The J-PET collaboration investigates a possibility of construction of a PET scanner from plastic scintillators which would allow for single bed imaging of the whole human body. This paper describes a novel method of hit-position reconstruction based on sampled signals… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.8293v1-abstract-full').style.display = 'inline'; document.getElementById('1407.8293v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1407.8293v1-abstract-full" style="display: none;"> Currently inorganic scintillator detectors are used in all commercial Time of Flight Positron Emission Tomograph (TOF-PET) devices. The J-PET collaboration investigates a possibility of construction of a PET scanner from plastic scintillators which would allow for single bed imaging of the whole human body. This paper describes a novel method of hit-position reconstruction based on sampled signals and an example of an application of the method for a single module with a 30 cm long plastic strip, read out on both ends by Hamamatsu R4998 photomultipliers. The sampling scheme to generate a vector with samples of a PET event waveform with respect to four user-defined amplitudes is introduced. The experimental setup provides irradiation of a chosen position in the plastic scintillator strip with an annihilation gamma quanta of energy 511~keV. The statistical test for a multivariate normal (MVN) distribution of measured vectors at a given position is developed, and it is shown that signals sampled at four thresholds in a voltage domain are approximately normally distributed variables. With the presented method of a vector analysis made out of waveform samples acquired with four thresholds, we obtain a spatial resolution of about 1 cm and a timing resolution of about 80 ps <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.8293v1-abstract-full').style.display = 'none'; document.getElementById('1407.8293v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2014. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1407.7395">arXiv:1407.7395</a> <span> [<a href="https://arxiv.org/pdf/1407.7395">pdf</a>, <a href="https://arxiv.org/ps/1407.7395">ps</a>, <a href="https://arxiv.org/format/1407.7395">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2014.07.052">10.1016/j.nima.2014.07.052 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Test of a single module of the J-PET scanner based on plastic scintillators </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+I">I. Moskal</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+M">M. Zieli艅ski</a>, <a href="/search/physics?searchtype=author&query=Zo%C5%84%2C+N">N. Zo艅</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Gajos%2C+A">A. Gajos</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">M. Molenda</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1407.7395v2-abstract-short" style="display: inline;"> Time of Flight Positron Emission Tomography scanner based on plastic scintillators is being developed at the Jagiellonian University by the J-PET collaboration. The main challenge of the conducted research lies in the elaboration of a method allowing application of plastic scintillators for the detection of low energy gamma quanta. In this article we report on tests of a single detection module bu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.7395v2-abstract-full').style.display = 'inline'; document.getElementById('1407.7395v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1407.7395v2-abstract-full" style="display: none;"> Time of Flight Positron Emission Tomography scanner based on plastic scintillators is being developed at the Jagiellonian University by the J-PET collaboration. The main challenge of the conducted research lies in the elaboration of a method allowing application of plastic scintillators for the detection of low energy gamma quanta. In this article we report on tests of a single detection module built out from BC-420 plastic scintillator strip (with dimensions of 5x19x300mm^3) read out at two ends by Hamamatsu R5320 photomultipliers. The measurements were performed using collimated beam of annihilation quanta from the 68Ge isotope and applying the Serial Data Analyzer (Lecroy SDA6000A) which enabled sampling of signals with 50ps intervals. The time resolution of the prototype module was established to be better than 80ps (sigma) for a single level discrimination. The spatial resolution of the determination of the hit position along the strip was determined to be about 0.93cm (sigma) for the annihilation quanta. The fractional energy resolution for the energy E deposited by the annihilation quanta via the Compton scattering amounts to sigma(E)/E = 0.044/sqrt(E[MeV]) and corresponds to the sigma(E)/E of 7.5% at the Compton edge. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.7395v2-abstract-full').style.display = 'none'; document.getElementById('1407.7395v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 August, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 6 figures; Updated with editorial corrections related to publication in NIM A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nuclear Inst. and Methods in Physics Research A 764 (2014), pp. 317-321 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1402.6840">arXiv:1402.6840</a> <span> [<a href="https://arxiv.org/pdf/1402.6840">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/bams-2014-0002">10.1515/bams-2014-0002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Determination of the map of efficiency of the J-PET detector with the GATE package </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Giergiel%2C+K">K. Giergiel</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">M. Molenda</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+I">I. Moskal</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik-Nied%C5%BAwiecka%2C+M">M. Pawlik-Nied藕wiecka</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1402.6840v1-abstract-short" style="display: inline;"> A novel PET detector consisting of strips of polymer scintillators is being developed by the J-PET Collaboration. The map of efficiency and the map of geometrical acceptance of the 2-strip J-PET scanner are presented. Map of efficiency was determined using the Monte Carlo simulation software GATE based on GEANT4. Both maps were compared using method based on the chi2 test. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1402.6840v1-abstract-full" style="display: none;"> A novel PET detector consisting of strips of polymer scintillators is being developed by the J-PET Collaboration. The map of efficiency and the map of geometrical acceptance of the 2-strip J-PET scanner are presented. Map of efficiency was determined using the Monte Carlo simulation software GATE based on GEANT4. Both maps were compared using method based on the chi2 test. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1402.6840v1-abstract-full').style.display = 'none'; document.getElementById('1402.6840v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 February, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 9 figures, proceeding from conference Symposium on Positron Emission Tomography: http://koza.if.uj.edu.pl/pet-symposium-2013/</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Bio-Algorithms and Med-Systems 10(2), 85-90 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1402.4116">arXiv:1402.4116</a> <span> [<a href="https://arxiv.org/pdf/1402.4116">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/bams-2014-0003">10.1515/bams-2014-0003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Database and data structure for the novel TOF-PET detector developed for J-PET project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Zieli%C5%84ski%2C+M">M. Zieli艅ski</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Kubicz%2C+E">E. Kubicz</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">M. Molenda</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik%2C+M">M. Pawlik</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1402.4116v1-abstract-short" style="display: inline;"> The complexity of the hardware and the amount of data collected during the PET imaging process require application of modern methods of efficient data organization and processing. In this article we will discuss the data structures and the flow of collected data from the novel TOF-PET medical scanner which is being developed at the Jagiellonian University. The developed data format reflects: regis… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1402.4116v1-abstract-full').style.display = 'inline'; document.getElementById('1402.4116v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1402.4116v1-abstract-full" style="display: none;"> The complexity of the hardware and the amount of data collected during the PET imaging process require application of modern methods of efficient data organization and processing. In this article we will discuss the data structures and the flow of collected data from the novel TOF-PET medical scanner which is being developed at the Jagiellonian University. The developed data format reflects: registration process of the gamma quanta emitted from positron-electron annihilation, Front-End Electronic (FEE) structure and required input information for the image reconstruction. In addition, the system database fulfills possible demands of the evolving J-PET project. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1402.4116v1-abstract-full').style.display = 'none'; document.getElementById('1402.4116v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 February, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 p, 3 figs, based on talk given at Symposium on Positron Emission Tomography, Sept. 19-22, 2013, Jagiellonian University, Krak贸w PL, submitted to Bio-Algorithms and Med-Systems</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Bio-Algorithms and Med-Systems 10(2), 79-83 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.6929">arXiv:1401.6929</a> <span> [<a href="https://arxiv.org/pdf/1401.6929">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Distributed, Parallel, and Cluster Computing">cs.DC</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/bams-2014-0001">10.1515/bams-2014-0001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Computing support for advanced medical data analysis and imaging </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Wi%C5%9Blicki%2C+W">W. Wi艣licki</a>, <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">M. Molenda</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">S. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik%2C+M">M. Pawlik</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a>, <a href="/search/physics?searchtype=author&query=Wieczorek%2C+A">A. Wieczorek</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1401.6929v1-abstract-short" style="display: inline;"> We discuss computing issues for data analysis and image reconstruction of PET-TOF medical scanner or other medical scanning devices producing large volumes of data. Service architecture based on the grid and cloud concepts for distributed processing is proposed and critically discussed. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.6929v1-abstract-full" style="display: none;"> We discuss computing issues for data analysis and image reconstruction of PET-TOF medical scanner or other medical scanning devices producing large volumes of data. Service architecture based on the grid and cloud concepts for distributed processing is proposed and critically discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.6929v1-abstract-full').style.display = 'none'; document.getElementById('1401.6929v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 p, 3 figs, based on talk given at Symposium on Positron Emission Tomography, Sept. 19-22, 2013, Jagiellonian University, Krak贸w, Pl</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Bio-Algorithms and Med-Systems 10(2014)52 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.2744">arXiv:1312.2744</a> <span> [<a href="https://arxiv.org/pdf/1312.2744">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/bams-2013-0110">10.1515/bams-2013-0110 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Calibration of photomultipliers gain used in the J-PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Bednarski%2C+T">T. Bednarski</a>, <a href="/search/physics?searchtype=author&query=Czerwi%C5%84ski%2C+E">E. Czerwi艅ski</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+P">P. Moskal</a>, <a href="/search/physics?searchtype=author&query=Bia%C5%82as%2C+P">P. Bia艂as</a>, <a href="/search/physics?searchtype=author&query=Giergiel%2C+K">K. Giergiel</a>, <a href="/search/physics?searchtype=author&query=Kap%C5%82on%2C+%C5%81">艁. Kap艂on</a>, <a href="/search/physics?searchtype=author&query=Kochanowski%2C+A">A. Kochanowski</a>, <a href="/search/physics?searchtype=author&query=Korcyl%2C+G">G. Korcyl</a>, <a href="/search/physics?searchtype=author&query=Kowal%2C+J">J. Kowal</a>, <a href="/search/physics?searchtype=author&query=Kowalski%2C+P">P. Kowalski</a>, <a href="/search/physics?searchtype=author&query=Kozik%2C+T">T. Kozik</a>, <a href="/search/physics?searchtype=author&query=Krzemie%C5%84%2C+W">W. Krzemie艅</a>, <a href="/search/physics?searchtype=author&query=Molenda%2C+M">M. Molenda</a>, <a href="/search/physics?searchtype=author&query=Moskal%2C+I">I. Moskal</a>, <a href="/search/physics?searchtype=author&query=Nied%C5%BAwiecki%2C+S">Sz. Nied藕wiecki</a>, <a href="/search/physics?searchtype=author&query=Pa%C5%82ka%2C+M">M. Pa艂ka</a>, <a href="/search/physics?searchtype=author&query=Pawlik%2C+M">M. Pawlik</a>, <a href="/search/physics?searchtype=author&query=Raczy%C5%84ski%2C+L">L. Raczy艅ski</a>, <a href="/search/physics?searchtype=author&query=Rudy%2C+Z">Z. Rudy</a>, <a href="/search/physics?searchtype=author&query=Salabura%2C+P">P. Salabura</a>, <a href="/search/physics?searchtype=author&query=Sharma%2C+N+G">N. G. Sharma</a>, <a href="/search/physics?searchtype=author&query=Silarski%2C+M">M. Silarski</a>, <a href="/search/physics?searchtype=author&query=S%C5%82omski%2C+A">A. S艂omski</a>, <a href="/search/physics?searchtype=author&query=Smyrski%2C+J">J. Smyrski</a>, <a href="/search/physics?searchtype=author&query=Strzelecki%2C+A">A. Strzelecki</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1312.2744v2-abstract-short" style="display: inline;"> Photomultipliers are commonly used in commercial PET scanner as devices which convert light produced in scintillator by gamma quanta from positron-electron annihilation into electrical signal. For proper analysis of obtained electrical signal, a photomultiplier gain curve must be known, since gain can be significantly different even between photomultipliers of the same model. In this article we de… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.2744v2-abstract-full').style.display = 'inline'; document.getElementById('1312.2744v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.2744v2-abstract-full" style="display: none;"> Photomultipliers are commonly used in commercial PET scanner as devices which convert light produced in scintillator by gamma quanta from positron-electron annihilation into electrical signal. For proper analysis of obtained electrical signal, a photomultiplier gain curve must be known, since gain can be significantly different even between photomultipliers of the same model. In this article we describe single photoelectron method used for photomultipliers calibration applied for J-PET scanner, a novel PET detector being developed at the Jagiellonian University. Description of calibration method, an example of calibration curve and gain of few R4998 Hamamatsu photomultipliers are presented. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.2744v2-abstract-full').style.display = 'none'; document.getElementById('1312.2744v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to Bio-Algorithms and Med-Systems (12 pages, 6 figures)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis 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