TY - JFULL AU - Sadegh Masoudi and Vahid Fayaz and Hassan Zandi and Asieh Tavakol PY - 2011/12/ TI - Uniformity of Dose Distribution in Radiation Fields Surrounding the Spine using Film Dosimetry and Comparison with 3D Treatment Planning Software T2 - International Journal of Medical and Health Sciences SP - 634 EP - 637 VL - 5 SN - 1307-6892 UR - https://publications.waset.org/pdf/4877 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 59, 2011 N2 - The overall penumbra is usually defined as the distance, p20–80, separating the 20% and 80% of the dose on the beam axis at the depth of interest. This overall penumbra accounts also for the fact that some photons emitted by the distal parts of the source are only partially attenuated by the collimator. Medulloblastoma is the most common type of childhood brain tumor and often spreads to the spine. Current guidelines call for surgery to remove as much of the tumor as possible, followed by radiation of the brain and spinal cord, and finally treatment with chemotherapy. The purpose of this paper was to present results on an Uniformity of dose distribution in radiation fields surrounding the spine using film dosimetry and comparison with 3D treatment planning software. ER -