医院介入诊疗设备辐射状况评价

Radiation evaluation of interventional diagnosis and treatment devices in hospital

目的 :探讨湖北某医院介入放射学设备运行对周围产生的辐射状况及工作人员的辐射水平。方法 :分析该医院辐射性工作场所辐射屏蔽状况,根据剂量当量控制水平,构建评价模型体系,估算数字化血管造影(digital subtraction angiography,DSA)机房屏蔽层厚及工作人员受照剂量。结果:DSA机房顶板的设计厚度小于理论估算厚度,其他机房屏蔽体的设计厚度均大于理论估算厚度,DSA机房东墙和顶板的理论估算厚度大于国家标准限值要求;工作人员不同部位受照剂量及年有效剂量均低于国家规定的限值要求。结论:DSA设备机房布局需进行优化,介入操作人员的辐射防护水平良好。

Objective To explore the radiation of the interventional diagnosis and treatment devices in some hospital of Hubei province to the circumstances and staffs.Methods The radiation shielding in the radiological workplace of the hospital was analyzed, and an evaluation model system was established based on dose equivalent level so as to estimate the shielding thickness of DSA machine room and the exposure dose to the staff. Results The designed shielding thickness of DSA machine room roof was tower than the theoretical one, while the designed thicknesses of other shields were higher than the theoretical ones, and the theoretical values of the east wall and roof in the DSA machine room were all higher than the limits of the national standards. The exposure doses to different parts and annual effective dose were all lower than the national limits. Conclusion The allocation of DSA machine room has to be optimized, and the staff gains satisfactory protection against radiation. [Chinese Medical Equipment Journal, 2017,38 （5） ： 99-102]