23EX直线加速器 7年故障统计分析经验

doi:10.3760/cma.j.issn.1004-4221.2016.12.015

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Abstract

Objective To study the application of statistical analysis of failure in the maintenance of a 23EX linear accelerator. Methods The failure data of a 23EX linear accelerator were collected from 2008 to 2015. The relationship between failure frequency and running time of the 23EX linear accelerator was analyzed. The Pareto diagram was used to analyze the main subsystems and components that had impacts on the stability of the 23EX linear accelerator. Results The 23EX linear accelerator had a total of 318 failures and 358 components replaced in 7 years. Within the first 1.5 years of use, the failure frequency gradually increased and the highest frequency was up to 38 failures per 6 months. Afterwards, the failure frequency declined and remained relatively stable. The third quarter had the highest failure frequency in a year. Multileaf collimator (MLC) and mechanical system, responsible for 66.4% and 11.9% of failures, respectively, were the main subsystems that had impacts on the stability of the 23EX linear accelerator. MLC nut and motor, taking 38.8% and 28.5% of replaced components, respectively, were the main components that had impacts on the stability of the 23EX linear accelerator. Conclusions The statistical analysis of accelerator failure helps maintenance personnel figure out the distribution of failures and identify the main factors for the accelerator stability. Moreover, it provides a basis for improving maintenance strategy.

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	Articles by authors
	Tan Tingqiang
	Li Li
	Huang Renbing

Key words： Linac Maintenance Statistic analysis Failure

Received: 21 September 2015

Cite this article:

Tan Tingqiang,Li Li,Huang Renbing. Experience in statistical analysis of failure of a 23EX linear accelerator within 7 years[J]. Chinese Journal of Radiation Oncology, 2016, 25(12): 1341-1344.

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http://journal12.magtechjournal.com/Jweb_fszlx/EN/10.3760/cma.j.issn.1004-4221.2016.12.015 OR http://journal12.magtechjournal.com/Jweb_fszlx/EN/Y2016/V25/I12/1341

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