期刊论文

中文

中国医学物理学杂志

1005-202X

2018

35

1

1-4

10.3969/j.issn.1005-202X.2018.01.001

国家重点研发计划（2017YFC0113201） 浙江省医药卫生科技计划项目（2017PY014）

本校为第一机构

目的:探讨电子射野影像系统(EPID)用于调强放射治疗三维剂量验证的可行性。方法:分别使用Varian公司的Trilogy加速器自带的EPID及EDose软件和美国Sun Nuclear公司的Mapcheck剂量验证系统及配套模体对10例调强放射治疗的患者进行剂量验证,记录并比较分析两种系统的绝对剂量和相对剂量γ 通过率的相关性。结果:采用γ(3%/3 mm)标准时,相对剂量EPID和Mapcheck验证的γ 通过率分别为(98.51%±1.10%)、(98.73%±0.69%);绝对剂量EPID和Mapcheck验证的γ通过率分别为(96.50%±3.33%)、(97.64%±1.51%),两者均无统计学意义(P>0.05)。其它标准的γ通过率有统计学意义。结论:EPID可以作为调强三维剂量验证...

Objective To investigate the feasibility of electronic portal imaging device (EPID) for the three-dimensional dosimetric verification of intensity-modulated radiotherapy (IMRT) plan. Methods The IMRT plans of 10 patients were verified with two systems, namely EDose software-based EPID of Varian Trilogy Linacs and Mapcheck system from Sun Nuclear Corporation with the matching phantom. The gamma passing rates of absolute dose and relative dose in two systems was recorded and analyzed. Results When the gamma standard (3％/3 mm) was applied, the ga...