Radiation emergency medical (REM) staff respond to many types of disasters such as radiological and nuclear accidents as well as environmental radioactivity exposure. The objective of this study was to evaluate the risk perception of REM staff on radiation exposure in various situations and to analyze the factors that affect their risk perception. A questionnaire was given to 284 REM staff affiliated with various organizations, including nuclear power generation, nuclear fuel manufacturing, large-scale irradiation, and radiation-waste disposal facilities, as well as research and development institutions. To determine the substantially influential factors for risk perception, we analyzed the questionnaire responses using ordinal logistic regression, Kruskal-Wallis, and Spearman correlation analyses. It was generally perceived by REM staff that low-dose radiation exposure in daily life and work environments does not pose any health risks. A higher level of radiation knowledge was tightly associated with a lower risk perception of REM staff on extremely low-dose (several mSv) radiation exposure, thus exhibiting an inverse correlation. In contrast to radiation researchers, the work experience of REM staff was not a contributing factor to their risk perception. In our study, REM staff with a high level of radiation knowledge did not have any health concerns in their work environments. Efforts to enhance the radiation knowledge of REM staff through proper education and training would result in analytical risk evaluation, which may also improve their willingness to help meet surge capacity needs in large-scale radiological events.

放射紧急医疗（REM）人员应对多种类型的灾难，例如放射和核事故以及环境放射性暴露。这项研究的目的是评估REM人员在各种情况下对放射线照射的风险感知，并分析影响其风险感知的因素。向284个与各组织有联系的REM人员进行了问卷调查，这些组织包括核能发电，核燃料制造，大规模辐照，辐射废物处置设施以及研发机构。为了确定风险感知的主要影响因素，我们使用序数逻辑回归，Kruskal-Wallis和Spearman相关分析对问卷调查进行了分析。REM工作人员通常认为，在日常生活和工作环境中低剂量的辐射暴露不会对健康构成任何威胁。高水平的辐射知识与极低剂量（几个mSv）辐射下的REM人员的较低风险感知紧密相关，因此表现出反相关关系。与放射线研究人员相比，REM员工的工作经验并不是影响其风险感知的因素。在我们的研究中，具有较高辐射知识的REM员工在其工作环境中没有任何健康问题。通过适当的教育和培训来增强REM工作人员的辐射知识的努力将导致分析风险评估，这也可能提高他们满足大规模放射事件中满足激增能力需求的意愿。