{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T11:52:49Z","timestamp":1791287569218,"version":"4.1.0"},"reference-count":32,"publisher":"Oxford University Press (OUP)","issue":"16","license":[{"start":{"date-parts":[[2026,6,29]],"date-time":"2026-06-29T00:00:00Z","timestamp":1782691200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,10,6]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>To validate the thyroid dose assessment performed at Nagasaki University after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident, the influence of 131I biodistribution on the direct in-vivo counting measurements by a scanning whole-body counter with two NaI(Tl) detectors was evaluated by a Monte Carlo simulation. The peak efficiency for gamma rays from 131I was calculated for the Bottle-Manikin Absorption (BOMAB) phantom and International Commission on Radiological Protection voxel phantom with a uniform radionuclide distribution in the body and a localized distribution in the thyroid. The ratio of scan peak efficiencies for the BOMAB phantom with the uniform and localized distribution was 1.17 (localized\/uniform), while that for the voxel phantom was 1.00. For the voxel phantom, a shielding by the head and tissues covering thyroid reduced the scan peak efficiency for the localized source, resulting in a negligible difference in peak efficiency between the source distributions. The assumption of a completely localized thyroid source is suggested to result in an underestimation within approximately 4% in residual activity assessment, considering 131I biodistribution calculated using ratios of physicochemical forms reported after the FDNPP accident, which represents a scenario with the maximum uncertainty. Consequently, the influence of 131I biodistribution on the scanning whole-body counting was negligibly small under the present conditions, partly due to the detector arrangement with two NaI(Tl) detectors positioned above and below the subject.<\/jats:p>","DOI":"10.1093\/rpd\/ncag069","type":"journal-article","created":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T11:53:08Z","timestamp":1781092388000},"page":"1306-1314","source":"Crossref","is-referenced-by-count":1,"title":["Effect of 131I biodistribution on measurements using a scanning whole-body counter"],"prefix":"10.1093","volume":"202","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4054-2501","authenticated-orcid":false,"given":"Yuki","family":"Tamakuma","sequence":"first","affiliation":[{"name":"Center for Radiation Research and Education, Nagasaki University , 1-12-4 Sakamoto, Nagasaki, Nagasaki 852-8523 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naoko","family":"Fukuda","sequence":"additional","affiliation":[{"name":"Department of Radiation Biology and Protection, Radiation Risk Control Unit, Atomic Bomb Disease Institute, Nagasaki University , 1-12-4 Sakamoto, Nagasaki, Nagasaki 852-8523 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9905-9026","authenticated-orcid":false,"given":"Osamu","family":"Kurihara","sequence":"additional","affiliation":[{"name":"Department of Radiation Measurement and Dose Assessment, Institute of Radiological Science, National Institutes for Quantum Science and Technology , 4-9-1 Anagawa, Inage, Chiba 263-8555 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naoki","family":"Matsuda","sequence":"additional","affiliation":[{"name":"Department of Radiation Biology and Protection, Radiation Risk Control Unit, Atomic Bomb Disease Institute, Nagasaki University , 1-12-4 Sakamoto, Nagasaki, Nagasaki 852-8523 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3982-0578","authenticated-orcid":false,"given":"Yu","family":"Abe","sequence":"additional","affiliation":[{"name":"Department of Radiation Biology and Protection, Radiation Risk Control Unit, Atomic Bomb Disease Institute, Nagasaki University , 1-12-4 Sakamoto, Nagasaki, Nagasaki 852-8523 ,","place":["Japan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3140-1061","authenticated-orcid":false,"given":"Sumi","family":"Yokoyama","sequence":"additional","affiliation":[{"name":"Department of Radiation Biology and Protection, Radiation Risk Control Unit, Atomic Bomb Disease Institute, Nagasaki University , 1-12-4 Sakamoto, Nagasaki, Nagasaki 852-8523 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