2019—2021年河北省部分医用直线加速器性能检测结果分析

Analysis of performance test results of some medical linear accelerators in Hebei Province, China, 2019—2021

目的了解河北省医用直线加速器质量控制现状。方法依据现行有效的相关标准GB 15213—2016《医用电子加速器性能和试验方法》、WS 674—2020《医用电子直线加速器质量控制检测规范》对2019—2021年河北省部分医用直线加速器主要性能指标进行检测。结果2019—2021年累计检测医用直线加速器175台次,年度合格率分别为72.4%(2019年)、75.9%(2020年)、79.4%(2021年);总初检合格率为76.0%,复检合格率为100.0%,初检合格率最低的指标为方形X辐射野均整度,其次是剂量偏差和方形X辐射野对称性。结论医疗机构需加强质控管理,对医用直线加速器进行定期检测,若发现剂量偏差等问题及时调整,以保障患者的治疗效果。

Objective To investigate the current situation of quality control in medical linear accelerators in Hebei Province,China.Methods The main performance indices of some medical linear accelerators in Hebei Province,2019—2021 were tested according to the current relevant effective standards GB 15213—2016 Medical Electron Accelerators-Functional Performance Characteristics and Test Methods and WS 674—2020 Specification for Testing of Quality Control in Medical Linear Accelerator.Results A total of 175 medical linear accelerators were tested from 2019 to 2021,and the annual pass rates were 72.4%in 2019,75.9%in 2020,and 79.4%in 2021.The overall pass rate of initial inspection was76.0%,and the pass rate of reinspection was 100.0%.The index with the lowest pass rate in the initial inspection was square X radiation field uniformity,followed by dose deviation and square X radiation field symmetry.Conclusion Medical institutions should strengthen quality control management,conduct regular testing of medical linear accelerators,and timely correct dose deviation,so as to ensure the treatment effect of patients.