医科达Compact加速器事故情况下的泄露辐射调查

The Leakage Radiation Investigation in the Case of Accident for Elekta Compact Linear Accelerator

目的:检测与分析研究医科达Compact加速器9号防护铅块一侧松动后,法规GB9706.5泄露X辐射。方法:根据国家标准"GB9706.5-2008医用电气设备第2部分:能量为1MeV至50MeV电子直线加速器安全专用要求"进行测试分析。结果:此次屏蔽铅块松动事故的发生,所导致泄露辐射值满足法规GB9706.5的限值要求。结论:医科达Compact加速器9号防护铅块一侧松动后,患者平面外的泄露X辐射水平满足国家法规标准要求,没有导致辐射安全事故。

Objective：verify if the NO. 9 lead dropping problem will impact the machine leakage protection requirement or not.Methods： According ＂GB 9706.5-2008 Medical electrical ecluipment-Part2-i：particular requirements for the safety of electron accelerators in the range 1MeV to 50 MeV＂ standard to test and analyze this case.Results： In this case, the absorbed dose due to leakage radiation don＇t exceed requirement which fitted by GB 9706.5 standard.Conclusion： The lead moving would be not affect the radiation leakage standard requirement, and this case isn＇t a radiation safety accident.