医疗卫生装备2012，Vol.33Issue(7)：108-109,122,3.
Varian直线加速器全碳纤维治疗床对放疗剂量的影响
Effect of Whole Carbon Fiber Couch of Varian Linear Accelerator on Radiotherapy Dose
花威 1李军 1陈婷婷 1谭飞 1汪步海1
作者信息
- 1. 江苏省苏北人民医院放疗中心,江苏扬州225001
- 折叠
摘要
Abstract
Objective To investigate the effect of whole carbon fiber couch of Varian Linear Accelerator on radiotherapy dose. Methods The solid water phantom was fixed at the center of main couch, engage part and extended plank. The high energy X-ray penetrated different couch plank from different angles, and the penetration factor of X-ray decline was calculated by measurement and comparison. Radiotherapy plans with couch and non -couch were designed by treatment planning system. Results The penetration factor of 6 MV and 15MV X-ray declined within the angle from 105 to 120 when main couch and extended plank were used. Min penetration factors of main couch at angle 115, were 0.9544 and 0.9685 respectively. Min penetration factors of extended plank at angle 110, were 0.9147 and 0.9247 respectively. Min penetration factors of engage part at angle 120, were 0.2817 and 0.5860 respectively, smaller than main couch and extended plank. The measured dose resemble to the computed value of the plan with couch which were designed by treatment planning system. Conclusion With the couch plank thickness increased penetration factor decreases. The main couch and extended plank for dose attenuation close, engage part has maximum attenuation. The higher energy is accompanied with larger penetration factor. Virtual couch must be used when designing radiotherapy treatment plan.[Chinese Medical Equipment Journal,2012,33(7) =108-109,122]关键词
直线加速器/治疗床/穿透因子/放射治疗Key words
linear accelerator/ treatment couch/ penetration factor/ radiotherapy分类
机械制造引用本文复制引用
花威,李军,陈婷婷,谭飞,汪步海..Varian直线加速器全碳纤维治疗床对放疗剂量的影响[J].医疗卫生装备,2012,33(7):108-109,122,3.
