Tomotherapy HDA型螺旋断层调强放疗设备剂量传输方式的质控标准建立  

Establishment of Quality Control Standards for Transmission Modes of HDA Type Tomotherapy Equipment

作　　者：庞廷田[1] 于浪[1] 杨波[1] 刘峡[1] 刘楠[1] 李文博[1] 董婷婷[1] 邱杰[1] PANG Tingtian;YU Lang;YANG Bo;LIU Xia;LIU Nan;LI Wenbo;DONG Tingting;QIU Jie(Department of Radiotherapy,Peking Union Medical College Hospital,Beijing 100730,China)

机构地区：[1]北京协和医院放疗科,北京100730

出　　处：《中国医疗设备》2022年第1期20-24,共5页China Medical Devices

基　　金：“十三五”国家重点研发计划(2016YFC0105206;2016YFC0105207)。

摘　　要：目的通过对本单位新装Tomotherapy HDA的两种调强传输方式的剂量验证结果进行测量分析,确定质控结果的合理范围,为质控工作提供依据。方法依照AAPM TG119要求对其提供的病例制作调强治疗计划,每种病例根据传输方式、铅门大小和运动方式分别制作计划,共95例调强计划,分别测量点剂量100例,面剂量45例,分析实际测量结果,并分别计算不同调强传输类型计划的置信区间。结果 Tomo-Helical传输模式靶区点剂量测量置信区间为±2.43%,危及器官点剂量验证置信区间为±1.46%。Tomo-Direct模式靶区点剂量验证置信区间为±2.72%,危及器官点剂量验证置信区间为±2.66%。面剂量验证结果为:Tomo-Helical模式通过率≥97.9%,Tomo-Direct通过率≥96.9%。结论本研究对本单位新安装的Tomotherapy HDA新型螺旋断层调强治疗进行测试,所测参数置信区间均在报告推荐范围之内,为新的螺旋断层调强技术和日后调强治疗计划的质控提供了依据。Objective To determine the reasonable range of quality control results which can provide a basis for quality control by measuring and analyzing the results of dose verification of two intensive-modulated transmission methods of HDA type tomotherapy equipment. Methods According to the requirements of AAPM TG119, intensity-modulated radiotherapy(IMRT) plans were made for the cases provided from the aspects of transmission mode, size of lead door, and mode of motion. A total of 95 IMRT plans were made, and 100 point doses and 45 area doses were measured respectively. The actual measurement results were analyzed, and the confidence intervals of different intensive-modulated transmission methods were calculated. Results The confidence interval of point dose in target area of Tomo-Helical transmission mode was ±2.43%, the Tomo-Helical confidence interval of point dose verification for organs at risk was ±1.46%, and that for Tomo-Direct transmission mode was ±2.72%, and that for Tomo-Direct transmission mode was ±2.66%. The results for area dose verification were: the passing rate of Tomo-Helical mode were ≥97.9%, and that for Tomo-Direct mode was ≥96.9%. Conclusion In this study, the newly installed HDA type tomotherapy equipment we tested and the confidence intervals of the measured parameters were within the recommended range of the report. It provides a basis for the quality control of new helical tomotherapy intensity-modulated technology and the future IMRT plans.

关 键 词：螺旋断层调强放射治疗 调强计划验证 Gamma分析 置信区间 

分 类 号：R730.55[医药卫生—肿瘤]