医科达Versa HD医用直线加速器束流典型故障的分析与排除  

Analysis and Elimination of Typical Faults of Beam in Elekta Versa HD Medical Linear Accelerator

作　　者：梁文杰[1] 罗庭军[1] LIANG Wenjie;LUO Tingjun(Radiotherapy Center,Guangxi Medical University Cancer Hospital,Nanning Guangxi 530021,China)

机构地区：[1]广西医科大学附属肿瘤医院放疗中心,广西南宁530021

出　　处：《中国医疗设备》2024年第12期165-170,177,共7页China Medical Devices

基　　金：广西壮族自治区卫生健康委员会自筹经费科研课题(Z20200216)。

摘　　要：束流系统是医用直线加速器的核心模块,主要用于电子加速形成束流以及束流成形为辐射野。束流系统结构复杂,涉及电路反馈信号多,易出现各类故障。本文总结了2例束流系统故障,包括束流运输系统和束流形成系统,将故障现象结合工作原理进行分析,针对闸流管老化所导致的束流报错,通过信号分析与更换高压部件得以解决;针对因不同位置采集器件损坏引起的初级散射器陆续报错,采用信号源检测、类比的方式确认故障点。本文阐明了此类故障解决思路,对同行具有参考意义。The beam system is the core module of the medical linear accelerator,which is mainly used for electron acceleration to form beam and beam shaping into radiation field.The beam system structure is complex,involves many circuit feedback signals,and is prone to all kinds of faults.This paper summarized two cases of beam system faults,including the beam transport system and beam shaping system.Through the analysis of fault phenomenon combined with the working principle,the beam fault caused by the aging of thyratron was solved by signal analysis and high voltage component replacement,as well as the primary scatterers reported faults one after another due to the damage of acquisition devices at different locations,the fault point was confirmed after the signal source detection and analogy.This pater clarifies the solution of such fault,which has reference significance for peers.

关 键 词：医用直线加速器 束流运输系统 束流形成系统 束流 闸流管 散射器 脉冲形成网络 

分 类 号：R197.39[医药卫生—卫生事业管理]