光子放疗靶区计划剂量验证的结果与分析  

Results and analysis of the target dose verification for photon radiotherapy

作　　者：卢峰[1] 陈英民[1] 宋钢[1] 李海亮[1] 陈睿[1] 邓大平[1] LU Feng;CHEN Yingmin;SONG Gang;LI Hailiang;CHEN Rui;DENG Daping(Institute of Radiation Medicine,Shandong Academy of Medicine Sciences,Jinan 250062 China)

机构地区：[1]山东省医学科学院放射医学研究所

出　　处：《中国辐射卫生》2019年第3期267-270,共4页Chinese Journal of Radiological Health

基　　金：山东省科技发展计划(2013YD18033);山东省医学科学院医药卫生科技创新工程

摘　　要：目的了解光子放疗靶区计划剂量与实测结果相对偏差的现状,分析产生偏差的原因,促进放射治疗质量控制工作。方法按照国际原子能机构(IAEA)277号技术报告中的测量方法对8台医用电子加速器、8台头部伽玛刀、3台螺旋断层放射治疗装置、3台机械臂放射治疗装置的31个放射治疗计划靶区中心处的点剂量进行测量,使用的仪器设备包括PTW公司UNIDOS型剂量仪、31010型0.125cc电离室及山东省医学科学院放射医学研究所研制的RTP-HB1型放射治疗质量控制检测模体。靶点处相对偏差在±5.0%以内的测量结果评价为合格。结果31个靶点剂量偏差总体合格率为90.3%。其中,加速器合格率为92.3%,头部伽玛刀合格率为87.5%,螺旋断层放射治疗装置及机械臂放射治疗装置合格率均为100%。结论放射治疗靶区计划剂量与实测结果相对偏差的总体合格率较高,但仍有必要加强放射治疗的质量控制工作。Objective To understand present situation of the deviation between the planned and measured target doses in photon radiotherapy,analyze the causes of deviation in order to promote the quality control.Methods According to methods in the Technical report 277 of the International Atomic Energy Agency(IAEA),8 medical electron accelerators,8 head gamma knife device,3 helical tomographic radiotherapy device and 3 robotic arm radiotherapy device were selected,and a total of 31 point doses at centers of the target areas were studied.The instruments used in the measurements included the UNIDOS dosimeter and the 0.125cc ionization chamber(Model 31010)produced by the PTW and the quality control phantom(RTPHB1)developed by the Institute of Radiation Medicine,Shandong Academy of Medical Sciences.If the deviation is within±5%,the results is judged to be qualified.Results The total qualified rate was 90.3%.Among them,the qualified rates are 92.3%,87.5%and 100%for the accelerator,the gamma knife and others,respectively.Conclusion The overall qualified rate is relatively high,but it is still necessary to strengthen the quality control of radiotherapy.

关 键 词：放射治疗 质量控制 靶区 剂量 

分 类 号：R144[医药卫生—公共卫生与预防医学]