Abstract

The International Commission on Radiological Protection recommends the adoption of the linear, no-threshold model as a predictive risk model for radiation protection purposes since the relationship between low-dose radiation exposure and cancer risk is unclear. Medical radiation workers are subject to occupational exposures and differences in workload, area of work and types of exposure can lead to variations in exposures between different occupational groups. We investigated the occupational exposures of 572 workers from four departments in two community hospitals and stratified into 22 occupational groups in order to identify groups with the highest radiation exposure. The occupational doses from 2015 to 2019 were analyzed to identify the dose distribution of each occupational group, total number of monitored workers, annual and collective deep (Hp(10)), eye (Hp(3)) and shallow (Hp(0.07)) doses. We further determined the individual and occupational group lifetime doses as well as the probability that monitored workers’ lifetime doses will exceed a specified lifetime dose level. The occupational groups with the highest radiation exposures were the nuclear medicine technologists, diagnostic imaging radiologists and diagnostic cardiologists. Although our data suggest that occupational doses reported are low, it is essential that exposure of occupationally exposed personnel are always kept as low as reasonably achievable with an effective radiation protection program.

中文翻译：

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两个社区医院医疗放射工作者的职业放射剂量评估

摘要

国际放射防护委员会建议采用线性，无阈值模型作为放射防护目的的预测风险模型，因为低剂量放射线暴露与癌症风险之间的关系尚不清楚。医用放射线工作人员会遭受职业暴露，工作量，工作领域和暴露类型的差异会导致不同职业组之间的暴露差异。我们调查了两家社区医院来自四个部门的572名工人的职业暴露，并将其分为22个职业类别，以便确定辐射暴露最高的类别。分析了2015年至2019年的职业剂量，以确定每个职业组的剂量分布，受监测工人总数，年度和集体深（Hp（10）），眼（Hp（3））和浅（Hp（0.07））剂量。我们进一步确定了个人和职业群体的终生剂量，以及被监测的工人的终生剂量将超过指定的终生剂量水平的可能性。辐射暴露最高的职业人群是核医学技术人员，诊断成像放射科医生和心脏病诊断专家。尽管我们的数据表明所报告的职业剂量很低，但至关重要的是，必须始终将职业暴露人员的暴露保持在有效的辐射防护计划可合理达到的最低水平。我们进一步确定了个人和职业群体的终生剂量，以及被监测的工人的终生剂量将超过指定的终生剂量水平的可能性。辐射暴露最高的职业人群是核医学技术人员，诊断成像放射科医生和心脏病诊断专家。尽管我们的数据表明所报告的职业剂量很低，但至关重要的是，必须始终将职业暴露人员的暴露保持在有效的辐射防护计划可合理达到的最低水平。我们进一步确定了个人和职业群体的终生剂量，以及被监测的工人的终生剂量将超过指定的终生剂量水平的可能性。辐射暴露最高的职业人群是核医学技术人员，诊断成像放射科医生和心脏病诊断专家。尽管我们的数据表明所报告的职业剂量很低，但至关重要的是，必须始终将职业暴露人员的暴露保持在有效的辐射防护计划可合理达到的最低水平。