四川省基层放疗单位医用直线加速器剂量和机械性能抽样分析

目的 对四川省基层放疗单位医用电子直线加速器进行剂量和机械性能抽样核查。方法 抽样选取四川省8家放疗单位,对其正在使用的医用电子直线加速器进行剂量和机械性能检测,其中包括5台进口加速器,3台国产加速器,检测项目和检测方法依据GB15213-94的要求执行。结果 14项检测结果中,未达国家标准的项目集中在辐射野平坦度、对称性和辐射野光野重合性方面,其他剂量精度检测和机械精度检测结果均较好。结论 亟待加强四川省基层放疗单位医用直线加速器日常剂量精度和机械精度QC工作,完善专业检测设备和专业人员配置及相关人员培训。需要以四川省放疗质量控制中心为依托,积极开展覆盖全省的放疗机QC监督指导工作。

Sampling and inspection of dose and mechanical properties of medical linear accelerators in grass-roots radiotherapy units in Sichuan Province,China

Objective To investigate the dose and mechanical properties of medical electron linear accelerators in grass-roots radiotherapy units in Sichuan Province,China via sampling and inspection.Methods A total of eight radiotherapy units in Sichuan Province were selected by sampling,and the tests were performed for the dose and mechanical properties of the medical electron linear accelerators in use.Among these accelerators,there were 5 imported accelerators and 3 domestic accelerators.The test items and methods were determined according to the requirements in GB15213-94.Results Among the 14 test items,the items related to the flatness,symmetry,and overlap of radiation field.The other tests of dose accuracy and mechanical precision achieved good results.Conclusions There is a need to strengthen the daily quality control work for dose and mechanical accuracy of medical electron linear accelerators in grass-roots radiotherapy units in Sichuan Province and perfect the allocation of professional equipment and personnel and training of related personnel.With the support of Sichuan Radiotherapy Quality Control Center,quality control supervision and guidance should cover the whole province.