医科达BJ-6B直线加速器脉冲调制器的故障分析

Analysis of breakdowns of pulse modulator of Yikeda BJ-6B linear accelerator

BJ-6B型加速器是用于肿瘤治疗的驻波型医用直线加速器。处于正常治疗状态时,计量率在200cGY/min。由于加速器结构复杂,加之长期使用后,元件老化、参数漂移、同时受电源的影响,在出束过程中,剂量率会出现波动。当系统调整不当或出现故障时,计量率波动超出其正常范围,有时会出现异常打火。

BJ-6B linear accelerator is a kind of medical device for treatment of tumors. Its counting rate is 200cGY/min under normal operating condition. There might be some breakdowns for long-term use.