PBS质子治疗系统快速日检QA方案的应用研究  

Application of rapid daily quality assurance for pencil beam scanning proton therapy system

作　　者：郑仁超 卢晓光 吴韦清 肖志平 刘飞 胡广原 袁响林 ZHENG Renchao;LU Xiaoguang;WU Weiqing;XIAO Zhiping;LIU Fei;HU Guangyuan;YUAN Xianglin(Department of Oncology,Tongji Hospital Affiliated to Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China;Research and Development Center of Precision Radiation Diagnosis and Treatment Technology,Research Institute of Tsinghua University in Shenzhen,Shenzhen 518057,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,湖北武汉430030 [2]深圳清华大学研究院精准放射诊疗技术研发中心,广东深圳518057

出　　处：《中国医学物理学杂志》2024年第10期1206-1210,共5页Chinese Journal of Medical Physics

基　　金：湖北省科技计划项目(2023BCB096)。

摘　　要：目的:通过分析IBA Sphinx Compact设备在迈胜紧凑型笔形束扫描质子治疗系统上的日检QA测量结果,评价该方案在质子治疗中的临床应用价值。方法:采用Sphinx Compact设备对迈胜S250i质子治疗系统进行连续30 d的日检QA测量,分析测量结果。结果:30 d内摆位激光灯与影像中心平均偏差为(0.42±0.27)mm;高能和低能笔形束的近端及远端深度误差均在0.50 mm以内;测量的所有光斑位置偏差不超过1.00 mm,尺寸偏差不超过7.5%;影像中心与射束中心偏差不超过0.75 mm;矩形射野平坦度相对偏差在0.5%左右;方野输出剂量偏差在1.0%以内。结论:Sphinx Compact设备能准确并快速测量AAPM TG-224号报告推荐的质子系统日检QA项目,提供实用且高效的解决方案,具有很好的临床实用价值。Objective To analyze the daily quality assurance(QA)measurement results of IBA Sphinx Compact device on the Mevion compact pencil beam scanning proton therapy system for evaluating its clinical application value in proton therapy.Methods The daily QA measurement of Mevion S250i proton therapy system was carried out with Sphinx Compact device for 30 consecutive days,and the measurement results were analyzed.Results The average deviation between the positioning laser and the image center was(0.42±0.27)mm in 30 days.All of the proximal and distal depth errors of the high-and lowenergy pencil beams were within 0.50 mm.The position deviation of all the spots measured did not exceed 1.00 mm,and the size deviation was less than 7.5%.The deviation between the image center and the beam center was not more than 0.75 mm.The relative deviation of the flatness of the rectangular field was about 0.5%.The deviation of the output dose of the square field was within 1.0%.Conclusion The proton system daily QA measurement items recommended by AAPM TG-224 report can be accurately and rapidly measured with Sphinx Compact device.The device is a practical and efficient daily QA tool with high practical value in clinic.

关 键 词：Sphinx Compact 笔形束扫描 质子治疗系统 日检QA 

分 类 号：R318[医药卫生—生物医学工程] R811.1[医药卫生—基础医学]