Kwon Tae-Eun, Jeong Areum, Ha Wi-Ho, Lee Dalnim, Seo Songwon, Cho Junik, Kim Euidam, Chung Yoonsun, Park Sunhoo
Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD 20850, USA.
National Radiation Emergency Medical Center, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Republic of Korea.
Nucl Eng Technol. 2023 Feb;55(2):725-733. doi: 10.1016/j.net.2022.10.030. Epub 2022 Nov 1.
The Korea Institute of Radiological and Medical Sciences has started a radiation epidemiological study, titled "Korean Radiation Worker Study," to evaluate the health effects of occupational exposure to radiation. As a part of this study, we investigated the methodologies and results of reconstructing organ-specific absorbed doses based on personal dose equivalent, (10), reported from 1984 to 2019 for 20,605 Korean radiation workers. For the organ dose reconstruction, representative exposure scenarios (i.e., radiation energy and exposure geometry) were first determined according to occupational groups, and dose coefficients for converting (10) to organ absorbed doses were then appropriately taken based on the exposure scenarios. Individual annual doses and individual cumulative doses were reconstructed for 27 organs, and the highest values were observed in the thyroid doses (on average 0.77 mGy/y and 10.47 mGy, respectively). Mean values of individual cumulative absorbed doses for the red bone marrow, colon, and lungs were 7.83, 8.78, and 8.43 mSv, respectively. Most of the organ doses were maximum for industrial radiographers, followed by nuclear power plant workers, medical workers, and other facility workers. The organ dose database established in this study will be utilized for organ-specific risk estimation in the Korean Radiation Worker Study.
韩国放射医学科学研究所启动了一项名为“韩国放射工作人员研究”的辐射流行病学研究，以评估职业性辐射暴露对健康的影响。作为该研究的一部分，我们调查了基于1984年至2019年期间20605名韩国放射工作人员报告的个人剂量当量（10）来重建器官特异性吸收剂量的方法和结果。对于器官剂量重建，首先根据职业类别确定代表性的暴露场景（即辐射能量和暴露几何形状），然后根据暴露场景适当地获取将（10）转换为器官吸收剂量的剂量系数。为27个器官重建了个体年剂量和个体累积剂量，甲状腺剂量中观察到的最高值（平均分别为0.77 mGy/y和10.47 mGy）。红骨髓、结肠和肺的个体累积吸收剂量平均值分别为7.83、8.78和8.43 mSv。大多数器官剂量在工业放射技师中最高，其次是核电站工作人员、医务人员和其他设施工作人员。本研究中建立的器官剂量数据库将用于韩国放射工作人员研究中的器官特异性风险评估。
