[1]梁兰,肖青,张翔宇,等.统计过程控制在医用电子直线加速器机械性能监测中的应用[J].中国医学物理学杂志,2023,40(2):133-138.[doi:DOI:10.3969/j.issn.1005-202X.2023.02.001]
 LIANG Lan,XIAO Qing,ZHANG Xiangyu,et al.Application of statistical process control in mechanical performance monitoring of linear accelerators[J].Chinese Journal of Medical Physics,2023,40(2):133-138.[doi:DOI:10.3969/j.issn.1005-202X.2023.02.001]
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统计过程控制在医用电子直线加速器机械性能监测中的应用()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
40卷
期数:
2023年第2期
页码:
133-138
栏目:
医学放射物理
出版日期:
2023-03-03

文章信息/Info

Title:
Application of statistical process control in mechanical performance monitoring of linear accelerators
文章编号:
1005-202X(2023)02-0133-06
作者:
梁兰肖青张翔宇宋莹李光俊柏森
四川大学华西医院肿瘤中心放射物理技术中心, 四川 成都 610041
Author(s):
LIANG Lan XIAO Qing ZHANG Xiangyu SONG Ying LI Guangjun BAI Sen
Department of Radiation Oncology, West China Hospital of Sichuan University, Chengdu 610041, China
关键词:
医用直线加速器统计过程控制机器性能检测质量保证
Keywords:
Keywords: medical linear accelerator statistical process control machine performance chech quality assurance
分类号:
R815.6
DOI:
DOI:10.3969/j.issn.1005-202X.2023.02.001
文献标志码:
A
摘要:
目的:使用统计过程控制方法分析医用电子直线加速器长期过程表现,监测加速器状态变化趋势,并评估加速器各项指标性能状态。方法:收集2019年6月至2021年4月加速器机器性能检测(MPC)数据。绘制每个机械指标的单值控制图,分析各指标过程特征,并使用过程能力指数Cpk及Cp评估加速器各项机械指标的过程质量。结果:加速器机械精度明显优于当前厂商推荐的规格限值,但控制图监测结果显示各指标均存在一定程度的过程漂移。过程能力分析结果显示所有指标的Cpk及Cp均大于1.33,过程质量优秀。结论:加速器在满足当前MPC规格限的情况下依然可能发生过程失控。统计过程控制方法可及时发现过程中的异常改变,过程能力指数可有效评估过程质量,为质量管理及临床决策提供有效的信息。
Abstract:
Objective To analyze the long-term performance of the medical linear accelerator, monitor the accelerator state and evaluate the mechanical performance of the accelerator by statistical process control method. Methods The daily quality assurance data from June 2019 to April 2021 were collected. The control charts for individuals were draw to monitor the process state, and the process quality was evaluated using process capability indexes (Cpk and Cp). Results The mechanical accuracy of the accelerator was obviously better than the specification limits recommended by the current manufacturer, while almost all mechanical indexes had process shifts to varying degrees according to the results of control chart. The process capability analysis showed that the Cpk and Cp of all test items were greater than 1.33, indicating excellent process quality. Conclusion When accelerator performance meets the current machine performance chech specifications, process shifts may still occur. The statistical process control method can detect the shifts immediately, and process capability index can evaluate the process quality effectively, guiding the quality management and clinical decision making.

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备注/Memo

备注/Memo:
【收稿日期】2022-11-15 【基金项目】国家自然科学基金(81972848);四川省科技计划项目(2021YFS0143);中华国际医学交流基金会肿瘤精准放疗星火计划(2019-N-11-04) 【作者简介】梁兰,硕士,研究方向:放射治疗物理技术,E-mail: lianglan.scu@foxmail.com 【通信作者】宋莹,硕士,副主任技师,研究方向:放射治疗物理技术,人工智能,E-mail: songying_wch@163.com
更新日期/Last Update: 2023-03-03