【摘要】 通过使用软件Varian公司的Trilogy加速器自带的EPID配合EDose软件和德国IBA公司的RAROR Chamber以及与其配套的DOSE1剂量仪和RW-3固体水分别对12例锥筒计划进行绝对剂量验证,记录并分析使用EDose软件时在不同标准下绝对剂量γ通过率和使用电离室时的点剂量验证结果。发现采用γ(3%/3 mm)、(3%/2 mm)、(2%/2 mm)标准时,EDose软件验证的绝对剂量γ通过率分别为(99.59%±0.33%)、(96.96%±1.27%)、(95.48%±1.37%),等中心处绝对剂量偏差为0.27%±1.02%;电离室测量的等中心处绝对剂量偏差为-0.03%±1.20%,最大偏差是-1.82%。两种验证方法的验证结果均满足临床治疗的要求且无统计学差异。结果表明基于电子射野影像系统(EPID)的EDose软件可以用于锥筒计划的剂量验证,而且可以提供二维剂量分布,操作更加方便,同时可以节约科室成本。更多还原

【Abstract】 The absolute dose verification of 12 cone-plans was performed by using the EPID that comes with the Trilogy Accelerator of the Varian company,the EDose software,the RARORChamber of the German IBA company,and the matching DOSE1 dosimeter and RW-3 solid water respectively,Record and analyze the absolute dose γ pass rate under different standards when using EDose software and the point dose verification results when using RARORChamber.It was found that when using γ(3%/3 mm),(3%/2 mm),(2%/2 mm) standards,the absolute dose γ pass rates verified by EDose software were(99.59%±0.33%),(96.96%±1.27%),(95.48%±1.37%),the absolute dose deviation at the isocenter is 0.27%±1.02%;the absolute dose deviation at the isocenter measured by the ionization chamber is-0.03%±1.20%,and the maximum deviation is-1.82%.The verification results of the two verification methods meet the requirements of clinical treatment without statistical difference.The results show that the EDose software based on EPID can be used for dose verification of cone-plan,and can provide two-dimensional dose distribution,which is more convenient to operate and saves department costs.更多还原