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Numerical Simulation Based on Individual Voxel Phantoms for a Sophisticated Evaluation of Internal Doses Mainly From 131I in Highly Exposed Workers Involved in the TEPCO Fukushima Daiichi NPP Accident
https://repo.qst.go.jp/records/49357
https://repo.qst.go.jp/records/493574993bad3-875c-461d-933d-71ad3dbac7fe
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-12-25 | |||||
| タイトル | ||||||
| タイトル | Numerical Simulation Based on Individual Voxel Phantoms for a Sophisticated Evaluation of Internal Doses Mainly From 131I in Highly Exposed Workers Involved in the TEPCO Fukushima Daiichi NPP Accident | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Kunishima, Naoaki
× Kunishima, Naoaki× Tani, Kotaro× Kurihara, Osamu× Kim, Eunjoo× Nakano, Takashi× Kishimoto, Riwa× Tsuchiya, Hiroki× Omatsu, Tokuhiko× Tatsuzaki, Hideo× Tominaga, Takako× Watanabe, Sadahiro× Ishigure, Nobuhito× 明石, 真言× Kunishima, Naoaki× Tani, Kotaro× Kurihara, Osamu× Eunjoo, Kim× Nakano, Takashi× Kishimoto, Riwa× Tsuchiya, Hiroki× Omatsu, Tokuhiko× Tatsuzaki, Hideo× Tominaga, Takako× Sadahiro, Watanabe× Ishigure, Nobuhito× Akashi, Makoto |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | As a response to the Tokyo Electric Power Company’s (TEPCO’s) Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in 2011, seven TEPCO workers whose exposure doses were expected to be > 250 mSv (a tentative dose limit stipulated by the Japanese central authority) attended Japan’s National Institute for Radiological Sciences (NIRS) for additional internal dose measurements. The NIRS examination revealed that these workers’ internal doses came mainly from their intake of the radioisotope iodine-131 (131I) during emergency operations. In this study we performed numerical simulations based on individual volume-pixel (voxel) phantoms of six of the seven workers for a more sophisticated evaluation of their internal doses, taking into account the individual thyroid size and other specific parameters. The voxel phantoms were created from magnetic resonance imaging (MRI) scan images. As a result, the individual thyroid volumes ranged from 6.5 to 28.2 cm3, and were considerably smaller than the reference value (~20 cm3) adopted in the International Commission on Radiation Protection’s (ICRP’s) dosimetric model for four of the six subjects. Compared to the original estimates of the thyroid absorbed dose, our preliminary evaluation revealed values that were increased by approx. threefold or decreased by 30% at maximum. A wide difference in the individual thyroid size would be one of the significant modifiers in the current dose estimation of subjects of the ongoing epidemiological study project. The present simulations also provided evidence that the direct thyroid measurements by the NIRS to determine the workers’ 131I thyroid contents were sufficiently accurate. | |||||
| 書誌情報 |
Health physics 巻 116, 号 5, p. 647-656, 発行日 2018-12 |
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| 出版者 | ||||||
| 出版者 | Wolters Kluwer Health, Inc. | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0017-9078 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1097/HP.0000000000000995 | |||||
