新型自屏蔽放疗加速器Zap-X系统屏蔽效果评价  

Evaluation of the radiation shielding effect of the novel self-shielding radiotherapy system Zap-X

作　　者：曹勤剑[1] 谭俊 任越[1] 熊万春[1] 卫晓峰[1] 程伟[1] CAO Qinjian;TAN Jun;REN Yue;XIONG Wanchun;WEI Xiaofeng;CHENG Wei(China Institute for Radiation Protection,Taiyuan 030006 China)

机构地区：[1]中国辐射防护研究院,山西太原030006

出　　处：《中国辐射卫生》2023年第3期288-292,共5页Chinese Journal of Radiological Health

摘　　要：目的基于新型自屏蔽放射治疗加速器周围关注点的周围剂量当量率测量结果,评价分析Zap-X放疗系统的自屏蔽效果,并为我国相关标准的修订完善提出建议。方法针对具有自屏蔽功能的新型放射外科治疗设备——ZapX系统,首先测量得到Zap-X系统周围15个关注点在6种不同系统运行状态下的周围剂量当量率。然后,分别依据国内和国际放射治疗设备的辐射防护标准对Zap-X系统的辐射屏蔽效果进行了评价。结果周围剂量当量率的测量以及剂量评价结果表明,Zap-X系统的屏蔽效果满足国际标准的相关要求,但是部分测量位置的剂量率不能满足国内标准的周围剂量当量率参考控制水平。结论Zap-X放射治疗系统在不使用屏蔽治疗室的情况下,自屏蔽效果不足以满足国内放射设备辐射安全与防护的要求,需要将系统布置在治疗室内才能符合国内标准。Objective Based on the measurement of the ambient dose equivalent rate of points around the novel selfshielding Zap-X radiotherapy system,its self-shielding effect was evaluated and analyzed,and suggestions were proposed for the revision and improvement of related standards in China.Methods The ambient dose equivalent rates were measured at 15 points around the Zap-X system under 6 system operating conditions.The radiation shielding effect of the Zap-X system was evaluated according to the domestic and international radiation protection standards of radiotherapy equipment.Results Measurement of ambient dose equivalent rate and dose evaluation showed that the shielding effect of the Zap-X system met the requirements of international standards,but the dose rates at some points failed to satisfy the reference control levels in the domestic standards.Conclusion Without the shielded treatment room,the self-shielding effect of the Zap-X radiotherapy system is insufficient to meet the requirements of domestic standards for radiation safety and protection.The system should be operated in the treatment room to meet domestic standards.

关 键 词：放射治疗 辐射屏蔽 辐射测量 

分 类 号：TL81[核科学技术—核技术及应用]