螺旋断层治疗设备多叶准直器故障分析  

Analysis of failure of helical tomotherapy multi-leaf collimator system

作　　者：李洪明[1] 于浪[1] 孙显松 王欣海[1] 胡克[1] 张福泉[1] 邱杰[1] Li Hongming;Yu lang;Sun Xiansong;Wang Xinhai;Hu Ke;Zhang Faquan;Qiu Jie(Department of Radiation Oncology,Peking Union Medical Hospital,Chinese Academy of Medical Sciences,Peking Union Medical College,Beijing 100730,China)

机构地区：[1]中国医学科学院北京协和医院放疗科,100730

出　　处：《中华放射肿瘤学杂志》2019年第2期155-157,共3页Chinese Journal of Radiation Oncology

摘　　要：目的通过对螺旋断层治疗设备二进制气动多叶准直器故障现象及处理方法的分析,总结相关维修经验,达到准确判断故障部件,缩短停机时间,提髙开机率的目的t方法对螺旋断层治疗设备48个月的多叶准直器维修情况进行统计和分析,总结出多叶准直器常见的故障部件、故障原因及处理方法。结果在48个月内,设备共出现多叶准直器故障20次,空气压缩机11次,位置验证板4次,叶片驱动器2次,叶片缓冲阀2次,叶片位置验证杆滑脱1次。多叶准直器故障与高压气体湿度有很大关系,设备出束时间对多叶准直器部分部件使用寿命也有很大影响。结论螺旋断层治疗设备多叶准直器结构复杂,高强度工作增加了其故障率,高压气体湿度影响设备多叶准直器的正常运行,通过总结多叶准直器维修经验可初步判断故障原因,确定故障部件,达到缩短停机时间、提高开机率的目的。Objective To analyze the failure and processing methods of helical tomotherapy multileaf collimator(MLC)and summarize relevant maintenance experience,aiming to accurately identify the faulty parts,shorten the downtime and enhance the work time.Methods The failure data of the helical tomotherapy MLC system in the past 48 months were analyzed to identify the common faulty parts,causes and processing methods.Results During the previous 48 months,the MLC failure occurred for 20 times,11 times for air compressor failure,4 times for position verification board failure,twice for leaf driver failure,twice for cushion valve failure and once for the slip of leaf position verification rod.The MLC failure was significantly correlated with the humidity of high-pressure gas.The work time of machine exerted significant effect upon the service time of MLC parts.Conclusions The structure of the helical tomotherapy MLC system is complex.The high-intensity work increases the failure rate.The humidity of high-pressure gas affects the normal operation of the MLC equipment.The faulty parts can be identified,the downtime can be reduced and the work time can be enhanced by summarizing the experience of MLC maintenance.

关 键 词：螺旋断层放射治疗 多叶准直器 二进制气动叶片 故障处理 

分 类 号：R197.39[医药卫生—卫生事业管理]