Investigation of Scattered Radiation Dose at the Door of a Radiotherapy Vault When the Maze Intersects the Primary Beam
Investigation of Scattered Radiation Dose at the Door of a Radiotherapy Vault When the Maze Intersects the Primary Beam作者机构：Department of Radiation Oncology Division of Medical Physics University of Toledo Medical Center Toledo Ohio USA
出 版 物：《Journal of Modern Physics》 (现代物理（英文）)
年 卷 期：2015年第6卷第2期
页 面：141-149页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Radiation Protection Radiation Shielding Scatter Monte Carlo
摘 要：NCRP 151 provides very detailed examples demonstrating the necessary concerns for shielding a conventional radiotherapy vault with a maze where the useful beam is parallel to the maze. However, it provides little guidance on how to properly shield a vault with the maze-wall acting as part of a compound primary barrier. We have modeled a new radiotherapy vault with this configuration and assessed the additional photon shielding burden at the door with MCNP5. MCNP simulations demonstrated an increase in overall photon shielding burden at the door relative to calculations that only consider photon workloads presented in NCRP 151. Two additional components of scattered radiation are considered and methods for calculation are presented.
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