迈胜S250i型质子治疗系统的束流性能及机械精度验收测试  

Acceptance test of beam performance and mechanical precision of the first Mevion type S250i proton therapy system in China

作　　者：吴韦清 卢晓光 郑仁超 刘飞 胡广原 袁响林 Wu Weiqing;Lu Xiaoguang;Zheng Renchao;Liu Fei;Hu Guangyuan;Yuan Xianglin(Department of Oncology,Tongji Hospital Affiliated to Tongji Medical College of Huazhong University of Science&Technology,Wuhan 430030,China)

机构地区：[1]华中科技大学同济医学院附属同济医院肿瘤科,武汉430030

出　　处：《中国医学装备》2024年第9期13-17,共5页China Medical Equipment

基　　金：湖北省科技计划项目(2023BCB096)。

摘　　要：目的:探讨国内首台迈胜S250i型质子治疗系统的束流性能及机械精度验收测试,验证其临床治疗的稳定性及可靠性。方法:根据厂家验收报告要求,验收测试迈胜S250i型质子治疗系统的机器跳数(MU)输出及射程、束斑尺寸及位置的精确性和稳定性、自适应光栅(AA)的半影和到位精度,以及临床使用需求的机械性能及功能性测试。结果:所测MU输出最大偏差为1.3%;射程最大偏差为0.037 g/cm^(2),最大远端剂量降落为0.465 cm,最小的能量调制范围为0.21 g/cm^(2);束斑大小最大偏差0.07 cm,位置最大偏差为0.05 cm;AA遮挡半影最大0.007 cm,且到位精度均<0.1 cm。结论:通过对迈胜S250i型质子治疗系统进行验收测试,在束流性能以及机械性能方面的结果参数均满足厂家验收合同以及美国医学物理师协会(AAPM)《质子治疗设备的全面QA报告》(AAPM TG-224)的需求,证明机器具有较好稳定性和可靠性。Objective:To discuss the acceptance test of beam performance and mechanical precision of the first Mevion type S250i proton therapy system in China,and verify the stability and reliability of that in clinical treatment.Methods:According to the requirements of acceptance report of manufacturer,the output and range of machine unit(MU),the accuracy and stability of size and position of beam spot,the penumbra and position accuracy of adaptive aperture(AA)of Mevion type S250i proton therapy system,as well as the tests of mechanical properties and functions of the requirement of clinical use,were checked and tested for acceptance.Results:The maximum deviation of MU output was 1.3%,and the maximum deviation of the range was 0.037 g/cm^(2),and the maximum distal fall-off was 0.465 cm,and the minimum range of energy modulation was 0.21 g/cm^(2).The maximum deviations of the size of beam spot and the maximum deviation of the position were respectively 0.07 cm and 0.05 cm.The maximum AA penumbra was 0.007cm,and the AA position accuracy was less than 0.1 cm.Conclusion:The acceptance test of the Mevion type S250i proton therapy system indicates that the parameters of the beam performance and mechanical precision can meet the requirements of the acceptance contract and AAPM-TG224 report of manufacturer,which has verified the machine has better favorable stability and reliability.

关 键 词：质子治疗系统 验收测试 束流性能 机械精度 自适应光栅 

分 类 号：R197.39[医药卫生—卫生事业管理]