西门子直线加速器剂量率低故障维修一例  

Analyzing the differences between the 3rd edition and the 2nd edition of IEC60601-2-4 about cardiac defibrillators

作　　者：吴海波 金军标 

机构地区：[1]台州市肿瘤医院放疗中心,浙江台州317502

出　　处：《医疗装备》2015年第9期59-59,共1页Medical Equipment

摘　　要：故障现象：西门子直线加速器在6MV X线模式200剂量率下工作4h后,剂量率会降低到40~50左右而无法继续治疗病人。关机1h左右再出束,剂量率恢复正常,但4h之后又降低到40~50左右。分析与维修：西门子加速器剂量率由以下三大部分决定：调制器,注入器和AFC,它们典型的信号波形分别为PULSE I、INJECTOR I和REFLECT WAVE。We analyzes the differences between the 3rd edition and the 2nd edition of IEC60601-2-4 about cardiac defibrillators.It is intended to help the designers and test engineers to realize the impact on the product design and test when evaluating according to the new standard.

关 键 词：剂量率 直线加速器 WAVE 驱动脉冲 注入器 偏置电压 钳位 驱动电压 编程数据 模式需要 

分 类 号：TL53[核科学技术—核技术及应用]