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Use of Iodine-131 to Tellurium-132 Ratios for Assessing the Relationships between Human Inhaled Radioactivity and Environmental Monitoring after the Accident in Fukushima

Author

Listed:
  • Koji Uchiyama

    (Laboratory of International Environmental Health, Center for International Cooperation, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun 321-0293, Tochigi, Japan
    Laboratory of International Epidemiology, Center for International Cooperation, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun 321-0293, Tochigi, Japan
    Technical Division, Anzai Medical Co., Ltd., 3-9-15 Nishishinagawa, Shinagawa, Tokyo 141-0033, Japan)

  • Masami Miyashita

    (Department of Radiology, Fukui Prefectural Hospital, 2-8-1 Yotsui, Fukui-shi 910-8526, Fukui, Japan)

  • Yoshinobu Tanishima

    (Department of Radiology, Fukui Prefectural Hospital, 2-8-1 Yotsui, Fukui-shi 910-8526, Fukui, Japan)

  • Shigenobu Maeda

    (Emergency Medicine, Fukui Prefectural Hospital, 2-8-1 Yotsui, Fukui-shi 910-8526, Fukui, Japan)

  • Hitoshi Sato

    (Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Ami-machi, Inashiki-gun 300-0394, Ibaraki, Japan)

  • Jun Yoshikawa

    (Department of Radiology, Fukui Prefectural Hospital, 2-8-1 Yotsui, Fukui-shi 910-8526, Fukui, Japan)

  • Shuji Watanabe

    (Department of Radiology, Fukui Prefectural Hospital, 2-8-1 Yotsui, Fukui-shi 910-8526, Fukui, Japan)

  • Masamichi Shibata

    (Department of Radiology, Fukui Prefectural Hospital, 2-8-1 Yotsui, Fukui-shi 910-8526, Fukui, Japan)

  • Shuji Ohhira

    (Laboratory of International Environmental Health, Center for International Cooperation, Dokkyo Medical University, 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun 321-0293, Tochigi, Japan)

  • Gen Kobashi

    (Department of Public Health, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun 321-0293, Tochigi, Japan)

Abstract

Significant differences in findings were seen between the intake amounts of iodine-131 that were derived from direct measurements and the estimated intake from environmental monitoring data at the Fukushima accident. To clarify these discrepancies, we have investigated the iodine-131 and tellurium-132 body burdens of five human subjects, who after being exposed to a radioactive plume, underwent 21.5 h whole body counter measurements at Fukui Prefectural Hospital, so clear intake scenario and thyroid counter measurement data were available. To determine the iodine-131 and tellurium-132 body burdens, we introduced a new method of whole body counter calibration composed of a self-consistent approach with the time-dependent correction efficiency factors concept. The ratios of iodine-131 to tellurium-132, ranging from 0.96 ± 0.05 to 2.29 ± 0.38, were consistent with results of the environmental measurements. The 24 h iodine uptake values ranging from 12.1–16.0% were within euthyroid range in Japanese people. These results suggest, even if the relatively low thyroid iodine uptake in the Japanese population was taken into consideration, that there is no doubt about the consistency between direct measurements and environmental monitoring data. Adequate intake scenario is suggested to be principally important to estimate the inhaled radioactivity in areas in or around nuclear accidents.

Suggested Citation

  • Koji Uchiyama & Masami Miyashita & Yoshinobu Tanishima & Shigenobu Maeda & Hitoshi Sato & Jun Yoshikawa & Shuji Watanabe & Masamichi Shibata & Shuji Ohhira & Gen Kobashi, 2018. "Use of Iodine-131 to Tellurium-132 Ratios for Assessing the Relationships between Human Inhaled Radioactivity and Environmental Monitoring after the Accident in Fukushima," IJERPH, MDPI, vol. 15(3), pages 1-15, March.
  • Handle: RePEc:gam:jijerp:v:15:y:2018:i:3:p:483-:d:135633
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    Citations

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    Cited by:

    1. Koji Uchiyama & Yasuo Haruyama & Hiromi Shiraishi & Kiyohiko Katahira & Daiki Abukawa & Takashi Ishige & Hitoshi Tajiri & Keiichi Uchida & Kan Uchiyama & Masakazu Washio & Erika Kobashi & Atsuko Maeka, 2020. "Association between Passive Smoking from the Mother and Pediatric Crohn’s Disease: A Japanese Multicenter Study," IJERPH, MDPI, vol. 17(8), pages 1-10, April.
    2. Shuhei Nomura & Michio Murakami, 2018. "Public Health Preparedness for and Response to Nuclear Disasters: An Editorial," IJERPH, MDPI, vol. 15(11), pages 1-4, November.

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