辽宁省307名介入放射工作人员个人剂量监测结果分析

Personal dose monitoring results of 307 interventional radiology workers in Liaoning Province,China

目的了解辽宁省介入放射工作人员职业外照射个人剂量水平,为更好的开展辐射防护工作提供参考依据。方法根据GBZ 128—2016《职业性外照射个人监测规范》,采用热释光法测量介入放射工作人员铅衣内剂量(H_(W))、铅衣外剂量(H_(N)),运用Mann-Whitney U检验和Kruskal-Wallis H检验对数据进行统计分析。结果2019年共采集307名介入放射工作人员双剂量监测数据,人均年有效剂量为0.81 mSv,最大年有效剂量为7.03 mSv,72.96%监测对象年有效剂量小于1 mSv;三级医院介入放射工作人员人均年有效剂量(0.95 mSv)高于二级医院(0.65 mSv),差异有统计学意义(P<0.05);不同科室人均年有效剂量差异有统计学意义(P<0.05),介入放射科人均年有效剂量(0.92 mSv)高于其他科室(0.64 mSv),心血管科人均年有效剂量(0.78 mSv)和脑血管科(0.78 mSv)剂量水平相当。结论辽宁省307名介入放射工作人员职业照射剂量水平满足国家法规标准要求,但高于全国人均年有效剂量水平,应进一步加强介入放射学的放射防护监督与人员培训。

Objective To investigate the personal dose level of occupational external exposure among interventional radi-ology workers in Liaoning Province of China,and to provide a reference for better occupational radiation protection.Methods According to the national standard GBZ 128—2016 Specifications for individual monitoring of occupational ex-ternal exposure,the thermoluminescence method was used to measure the monitoring dose inside the lead clothes(H_(W))and outside the lead clothes(H_(N))of interventional radiology workers,and the Mann-Whitney U test and the Kruskal-Wallis H test were used for statistical analysis.Results Dual dosimeter monitoring data were collected from 307 interventional radi-ology workers in Liaoning Province in 2019,with a mean annual effective dose of 0.81 mSv and a maximum annual effect-ive dose of 7.03 mSv,and 72.96%of the workers monitored had an annual effective dose of less than 1 mSv.The interven-tional radiology workers in tertiary hospitals had a significantly higher mean annual effective dose than those in secondary hospitals(0.95 mSv vs 0.65 mSv,P<0.05).There was a significant difference in mean annual effective dose between de-partments(P<0.05),and the department of interventional radiology had a significantly higher mean annual effective dose than the other departments(0.92 mSv vs 0.64 mSv),while the department of cardiology had a similar mean annual effective dose to the cerebrovascular department(0.78 mSv vs 0.78 mSv).Conclusion The occupational exposure dose of 307 inter-ventional radiology workers in Liaoning Province meets the requirements in national regulations and standards and is higher than the national level,which suggests that radiation protection supervision and personal training should be further strengthened for interventional radiology.