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Development of a new hand-held type thyroid monitor using multiple GAGG detectors for young children following a nuclear accident
https://repo.qst.go.jp/records/84670
https://repo.qst.go.jp/records/84670affa7834-5698-471d-ba9b-6d07bdeeb59e
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-01-11 | |||||
| タイトル | ||||||
| タイトル | Development of a new hand-held type thyroid monitor using multiple GAGG detectors for young children following a nuclear 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 |
Kazuaki, Yajima
× Kazuaki, Yajima× Eunjoo, Kim× Kotaro, Tani× Masumi, Ogawa× Yu, Igarashi× Munehiko, Kowatari× Osamu, Kurihara× Kazuaki, Yajima× Eunjoo, Kim× Kotaro, Tani× Masumi, Ogawa× Yu, Igarashi× Munehiko, Kowatari× Osamu, Kurihara |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | One of the most important lessons learned from the Fukushima Daiichi Nuclear Power Plant accident is that direct (in vivo) measurements of thyroid exposure to radioiodine (mainly, 131I) in the affected populations should be initiated in a timely manner. Furthermore, the existing commercial detectors are not necessarily suitable for the measurement of young children, who are especially vulnerable to radiation exposure and therefore important to screen. This paper presents the development of a new thyroid monitor for such measurements and the results from phantom-based experiments. The monitor has two unique probes having multiple high-energy-resolution type Gd3(Al,Ga)5O12(Ce) (GAGG) detectors that can be placed directly on the young subject’s anterior neck. The crystal size of the GAGG detector is 1 cm3, and a probe consisting of a 4 × 1 or 4 × 2 detector array can be selected depending on the subject’s body size. The thickness of the 4 × 1 array probe is 24 mm, which is less than that for a conventional NaI(Tl) survey meter having a crystal 1 inch in diameter and 1 inch long (38 mm). Experimental and computational calibrations of the new monitor using existing and virtual phantoms allowed us to determine the full energy peak efficiency for the 131I thyroid contents of different age groups from 3-mo-old to 10-yr-old and minimum detectable activity (MDA) values under various conditions. As a result, the attainable MDA for subjects age ≤5 years under a normal background level (~0.05 μSv h-1) was found to be ~30 Bq, which was low enough to identify children with thyroid-equivalent doses over 10 mSv up to about 25 days after the 131I intake. Our new monitor would be useful in direct thyroid measurements for vulnerable young children following a large nuclear accident. | |||||
| 書誌情報 |
Radiation Measurements 巻 150, p. 106683, 発行日 2021-11 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1350-4487 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.radmeas.2021.106683 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.sciencedirect.com/science/article/pii/S1350448721001918?via%3Dihub | |||||
