Application of failure mode and effects analysis and fault tree analysis to IMRT planning
10.3760/cma.j.issn.0254-5098.2019.09.007
- VernacularTitle: 故障模式和效应分析与故障树分析方法在调强放射治疗计划设计流程中的应用
- Author:
Shouliang DING
1
;
Jiang HU
;
Jun ZHANG
;
Huikuan GU
;
Yixuan WANG
;
Yimei LIU
;
Xiaoyan HUANG
Author Information
1. Department of Radiation Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Publication Type:Journal Article
- Keywords:
Intensity modulated radiotherapy;
Failure modes and effects analysis;
Failure tree analysis;
Quality management
- From:
Chinese Journal of Radiological Medicine and Protection
2019;39(9):673-679
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate IMRT planning process using the combined application of failure modes and effects analysis (FMEA) and fault tree analysis (FTA) by reference to the report of Task Group 100 of the AAPM, and stablish and optimize the quality.
Methods:A multidisciplinary team detailed the process mapping of IMRT planning using Eclipse TPS. The team evaluated the potential failure modes (FMs) of every process step. The evaluation was divided into two groups according to whether quality management (QM) was considered. For every FM, occurrence (O), severity (S) and detectability (D) by consensus were evaluated, and the product of O, S and D yielded the risk priority number (RPN), which permitted the ranking of the FMs. Finally, FTA was used to determine the root factors contributing to the riskiest failure modes.
Results:The IMRT plan process consisted of 10 major sub-processes and 33 steps, which amounted to 47 failure modes. For the group without quality management, the RPN of FMs was between 13.2-271.8, 27 of which had RPN≥80, and 18 FMs had S≥8. For the group with quality management, the RPN of FMs was between 11.2-158.4, 11 of which had RPN≥80. The difference of RPN between the two groups was statistically significant (RPN of the group without QM=101.17±66.34, RPN of the group with QM=59.54±35.64, t=8.501, P<0.05). Finally, FTA was used to determine the root factors contributing to the FMs, i. e., prescription dose definition and importing images.
Conclusions:The FMEA and FTA methods are operable and practical, which can systematically and comprehensively analyze the potential failures and risks existing in the process of IMRT plan. And the FMEA and FTA can contribute to establish and optimize the quality management program in radiotherapy.
