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Journal Articles

Implication of E3 ligase RAD18 in UV-induced mutagenesis in human induced pluripotent stem cells and neuronal progenitor cells

Shimada, Mikio*; Tokumiya, Takumi*; Miyake, Tomoko*; Tsukada, Kaima*; Kanzaki, Norie; Yanagihara, Hiromi*; Kobayashi, Junya*; Matsumoto, Yoshihisa*

Journal of Radiation Research (Internet), 64(2), p.345 - 351, 2023/03

 Times Cited Count:0 Percentile:0.01(Biology)

Journal Articles

Estimation of children's thyroid equivalent doses in 16 municipalities after the Fukushima Daiichi Nuclear Power Station accident

Suzuki, Gen*; Ishikawa, Tetsuo*; Oba, Takashi*; Hasegawa, Arifumi*; Nagai, Haruyasu; Miyatake, Hirokazu*; Yoshizawa, Nobuaki*

Journal of Radiation Research (Internet), 63(6), p.796 - 804, 2022/11

 Times Cited Count:1 Percentile:29.28(Biology)

To elucidate the association between radiation dose and thyroid cancer after the 2011 Fukushima Daiichi Nuclear Power Station (FDNPS) accident, it is essential to estimate individual thyroid equivalent doses (TEDs) to children. In a previous study, we reported a methodology for reconstructing TEDs from inhalation based on individual behavioural survey sheets combined with a spatiotemporal radionuclides database constructed by an atmospheric transport, diffusion, and deposition model (ATDM). In the present study, we further refined our methodology and estimated the combined TEDs from inhalation and ingestion among children in 16 municipalities around the nuclear power station utilizing 3,256 individual whereabouts questionnaire survey sheets. Distributions of estimated TEDs were similar to estimates based on direct thyroid measurements in 1080 children in Iwaki City, Kawamata Town, Iitate Village, and Minamisoma City. Mean TEDs in 1-year-old children ranged from 1.3 mSv in Date City to 14.9 mSv in Odaka Ward in Minamisoma City, and the 95th percentiles varied from 2.3 mSv in Date City to 28.8 mSv in Namie Town. In the future, this methodology can be useful for a case-control study of thyroid cancer after the FDNPS accident.

Journal Articles

Reconstruction of residents' thyroid equivalent doses from internal radionuclides after the Fukushima Daiichi Nuclear Power Station accident

Oba, Takashi*; Ishikawa, Tetsuo*; Nagai, Haruyasu; Tokonami, Shinji*; Hasegawa, Arifumi*; Suzuki, Gen*

Scientific Reports (Internet), 10(1), p.3639_1 - 3639_11, 2020/02

 Times Cited Count:17 Percentile:84.21(Multidisciplinary Sciences)

Internal doses of residents after the Fukushima Daiichi Nuclear Power Station accident have been reconstructed. In total 896 behaviour records in the Fukushima Health Management Survey were analysed to estimate thyroid doses via inhalation, using a spatiotemporal radionuclides concentration database constructed by atmospheric dispersion simulations. After a decontamination factor for sheltering and a modifying factor for the dose coefficient were applied, estimated thyroid doses were close to those estimated on the basis of direct thyroid measurement. The median and 95th percentile of thyroid doses of 1-year-old children ranged from 1.2 to 15 mSv and from 7.5 to 30 mSv, respectively.

Oral presentation

Re-assessment of evacuation patterns and thyroid equivalent doses for children via inhalation after the Fukushima Daiichi Nuclear Power Station accident

Oba, Takashi*; Ishikawa, Tetsuo*; Nagai, Haruyasu; Tokonami, Shinji*; Hasegawa, Arifumi*; Suzuki, Gen*

no journal, , 

no abstracts in English

Oral presentation

The Analysis of relationship between thyroid doses distribution for children via inhalation and evacuation behavior patterns in the Fukushima Daiichi Nuclear Power Plant Accident

Oba, Takashi*; Ishikawa, Tetsuo*; Nagai, Haruyasu; Hasegawa, Arifumi*; Fukaya, Kigen*; Suzuki, Gen*

no journal, , 

no abstracts in English

Oral presentation

Investigation of uncertainties in estimating thyroid equivalent dose from body surface contamination measurements

Oba, Takashi*; Ishikawa, Tetsuo*; Miyatake, Hirokazu*; Nagai, Haruyasu; Hasegawa, Arifumi*; Yoshizawa, Nobuaki*; Suzuki, Gen*

no journal, , 

no abstracts in English

Oral presentation

Reconstruction of childhood thyroid doses based on whereabout questionnaire sheets in combination with ATDM simulation

Suzuki, Gen*; Oba, Takashi*; Ishikawa, Tetsuo*; Hasegawa, Arifumi*; Nagai, Haruyasu; Yoshizawa, Nobuaki*; Miyatake, Hirokazu*

no journal, , 

no abstracts in English

Oral presentation

Estimation of internal exposure doses from tap water intake after Fukushima Daiichi Nuclear Power Station accident and its uncertainty

Miyatake, Hirokazu*; Yoshizawa, Nobuaki*; Suzuki, Gen*; Nagai, Haruyasu; Oba, Takashi*; Hasegawa, Arifumi*; Ishikawa, Tetsuo*; Regalado, Mariko*

no journal, , 

no abstracts in English

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