Thyroid radiation doses were estimated for a cohort of 2,965 Belarusian persons who were exposed in utero and during early life to fallout from the Chernobyl nuclear power plant accident. Prenatal and postnatal doses to the thyroid due to intake of I, external irradiation from radionuclides deposited on the ground, and ingestion of cesium isotopes (Cs and Cs) were calculated for all cohort members. Dose estimation was based on personal interviews with subjects' mothers; the interviews collected data on subjects' residential history, consumption by mothers during time of pregnancy and breast-feeding, as well as consumption by subjects after birth. Direct instrumental measurements of radioactivity in mothers and the study subjects, if available, were also used for calculation of doses. Intake of I by mothers was found to be the predominant pathway for thyroid exposure for the study subjects. The average thyroid dose due to all exposure pathways was estimated to be 137 mGy (median dose of 25 mGy, maximal dose of 14.8 Gy), including 130 mGy (median dose of 17 mGy, maximal dose of 14.8 Gy) from I intake, 4.9 mGy (median dose of 3.0 mGy, maximal dose of 102 mGy) due to external irradiation, and 2.5 mGy (median dose of 1.7 mGy, maximal dose of 47 mGy) due to ingestion of Cs. The dose estimates will be used to evaluate the radiation-related risk of thyroid cancer and other thyroid diseases in this unique cohort.

中文翻译：

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对在子宫内和生命早期暴露于切尔诺贝利辐射的白俄罗斯人群的甲状腺剂量估计。

对 2,965 名白俄罗斯人的甲状腺辐射剂量进行了估计，这些人在子宫内和生命早期就受到了切尔诺贝利核电站事故的影响。计算了所有队列成员由于 I 摄入、地面沉积放射性核素的外部照射以及铯同位素（Cs 和 Cs）摄入而导致的产前和产后甲状腺剂量。剂量估计是基于对受试者母亲的个人访谈；访谈收集了受试者的居住史、母亲在怀孕和哺乳期间的消费以及受试者出生后的消费数据。如果有的话，还使用直接仪器测量母亲和研究对象的放射性来计算剂量。研究发现，母亲摄入 I 是研究对象甲状腺暴露的主要途径。所有暴露途径引起的平均甲状腺剂量估计为 137 mGy（中位剂量 25 mGy，最大剂量 14.8 Gy），包括来自 I 摄入的 130 mGy（中位剂量 17 mGy，最大剂量 14.8 Gy），4.9外部照射引起的 mGy（中位剂量 3.0 mGy，最大剂量 102 mGy），以及摄入 Cs 引起的 2.5 mG​​y（中位剂量 1.7 mGy，最大剂量 47 mGy）。剂量估计将用于评估这个独特队列中甲状腺癌和其他甲状腺疾病的辐射相关风险。