四川省~(60)Co后装近距离治疗机质量控制检测结果及分析
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摘要
目的通过对10台~(60)Co后装近距离治疗机性能进行检测,调查四川省~(60)Co后装近距离治疗机质量控制现状,探讨~(60)Co后装近距离治疗机质量控制的测试方法。方法根据标准WS 262-2017《后装γ源近距离治疗质量控制检测规范》的检测方法对~(60)Co后装近距离治疗机6项质量控制检测项目进行检测。结果 1颗~(60)Co放射源活度相对偏差为-9.9%,超出了±5%的要求范围。一台~(60)Co后装近距离治疗机放射源累计定位误差不在标准限值内。结论 ~(60)Co后装近距离治疗机在制定计划和治疗前,应该对每颗~(60)Co后装源活度进行质量控制检测,定期对后装机各项性能指标质量控制,加强对机器性能的维护。
Objective By testing the performance of 10 ~(60)Co sources afterloading brachytherapy machines, the quality control status in Sichuan province was investigated, and research the test methods for quality control. Methods According to the test methods of the standard WS 262-2017 "Inspection specification for quality control of γ-ray sources afterloading brachytherapy ", 6 quality control test items of 60 Co afterloading brachytherapy machine were tested.Results The relative deviation of the activity of a ~(60)Co source was-9.9%, which exceeds the range of ± 5.0%. The source cumulative positioning error of 1 machine is not within the standard limit. Conclusion Before making the plan and treatment, the quality control test should be carried out on the activity of every ~(60)Co afterloading brachytherapy source and the performance of afterloading brachytherapy machine. The maintenance of machine performance should be strengthened.
Objective By testing the performance of 10 ~(60)Co sources afterloading brachytherapy machines, the quality control status in Sichuan province was investigated, and research the test methods for quality control. Methods According to the test methods of the standard WS 262-2017 "Inspection specification for quality control of γ-ray sources afterloading brachytherapy ", 6 quality control test items of 60 Co afterloading brachytherapy machine were tested.Results The relative deviation of the activity of a ~(60)Co source was-9.9%, which exceeds the range of ± 5.0%. The source cumulative positioning error of 1 machine is not within the standard limit. Conclusion Before making the plan and treatment, the quality control test should be carried out on the activity of every ~(60)Co afterloading brachytherapy source and the performance of afterloading brachytherapy machine. The maintenance of machine performance should be strengthened.
引文
[1] 中华人民共和国国家卫生和计划生育委员会.WS 262-2017 后装γ源近距离治疗质量控制检测规范[S].北京:中国标准出版社,2017.
[2] 李开宝,罗素明.医用电离辐射物理剂量学的进展[J].中华放射医学与防护杂志,1999,19(3):156-160.
[3] 王先良,袁珂,唐斌,等.GZP型60Co源剂量学参数的蒙特卡洛模拟[J].中华放射肿瘤学杂志,2016,25(5):489-495.
[4] 龙凤翔,许安健,雷琴,等.GZP3钴-60近距离治疗源剂量学参数的蒙特卡洛计算[J].中国医学物理学杂志 2017,34(2):115-120.
[5] 罗素明,李景云,何志坚,等.测量近距离治疗源活度的井型电离室研制[J].中华放射医学与防护杂志,2005,25(4):370-373.
[6] 罗素明,何志坚,高磊,等.测量后装近距离放射治疗192Ir源参考空气比释动能方法学研究[J].中华放射医学与防护杂志,2008,28(4):398-400.
[7] 王进.近距离治疗机192Ir放射源的校准方法[J].中国辐射卫生,2004,13(4):295-296.
[8] 王进,杨春勇,许翠珍,等.11台近距离治疗机192Ir源外观活度质量控制检测[J].中国辐射卫生,2007,16(2):187-188.
[9] 罗素明,何志坚,高磊,等.后装治疗源192Ir空气比释动能强度检测与评价[J].中华放射医学与防护杂志,2011,31(1):76-78.
[10] 王进,杜翔,张乙眉,等.近距离治疗机192Ir源有效活度质量控制检测与比对[J].中国辐射卫生,2008,17(3):324-325.
[2] 李开宝,罗素明.医用电离辐射物理剂量学的进展[J].中华放射医学与防护杂志,1999,19(3):156-160.
[3] 王先良,袁珂,唐斌,等.GZP型60Co源剂量学参数的蒙特卡洛模拟[J].中华放射肿瘤学杂志,2016,25(5):489-495.
[4] 龙凤翔,许安健,雷琴,等.GZP3钴-60近距离治疗源剂量学参数的蒙特卡洛计算[J].中国医学物理学杂志 2017,34(2):115-120.
[5] 罗素明,李景云,何志坚,等.测量近距离治疗源活度的井型电离室研制[J].中华放射医学与防护杂志,2005,25(4):370-373.
[6] 罗素明,何志坚,高磊,等.测量后装近距离放射治疗192Ir源参考空气比释动能方法学研究[J].中华放射医学与防护杂志,2008,28(4):398-400.
[7] 王进.近距离治疗机192Ir放射源的校准方法[J].中国辐射卫生,2004,13(4):295-296.
[8] 王进,杨春勇,许翠珍,等.11台近距离治疗机192Ir源外观活度质量控制检测[J].中国辐射卫生,2007,16(2):187-188.
[9] 罗素明,何志坚,高磊,等.后装治疗源192Ir空气比释动能强度检测与评价[J].中华放射医学与防护杂志,2011,31(1):76-78.
[10] 王进,杜翔,张乙眉,等.近距离治疗机192Ir源有效活度质量控制检测与比对[J].中国辐射卫生,2008,17(3):324-325.