上海市医用电子直线加速器质量控制和防护水平检测结果分析

目的 了解上海市医用电子直线加速器质量控制和防护水平情况。方法 采用分层随机方法，覆盖三级、二级及未定级医院，选取上海市15家医院的30台医用电子直线加速器作为研究对象，按照相关质量控制标准和防护检测标准对加速器进行质量控制检测和防护水平检测。结果 质量控制检测的30台医用电子直线加速器有5台不合格，总体初检合格率83.3%，复检合格率100%;(5 cm×5 cm)～(30 cm×30 cm)的X射线方形照射野的均整度合格率为83.3%,X射线方形照射野的对称性合格率为96.7%，其余指标均合格；30台医用电子直线加速器的机房防护检测均合格。结论 上海市医用电子直线加速器机房防护满足国家标准的要求，部分性能指标初检结果不符合国家标准的要求，应进一步加强医用电子直线加速器的质量控制，保障患者的治疗效果。

Analysis of quality control and protection level test results of medical electron linear accelerators in Shanghai,China

Objective To investigate the quality control and protection level of medical electron linear accelerators in Shanghai, China. Methods The startified random sampling method was used to cover tertiary, secondary and ungraded hospitals, and a total of 30 medical electron linear accelerators in 15 hospitals were tested for quality control and protection level according to relevant standards. Results Five medical electron linear accelerators failed the quality control test, with an overall inspection pass rate of 83.3% and a re-inspection pass rate of 100%. The pass rate of flatness of square X-ray irradiation field (5 cm × 5 cm)-(30 cm × 30 cm) was 83.3%, the pass rate of symmetry of square X-ray irradiation field was 96.7%, and other indices were qualified. All medical electron linear accelerator rooms passed the protection test. Conclusion The protection of medical electron linear accelerator rooms in Shanghai meets the requirements of national standards, and some indices do not meet the requirements of national standards in the preliminary inspection. The quality control of medical electron linear accelerators should be further strengthened to ensure the treatment effect of patients.