Estimation of Dose Absorbed Fraction for ^<131>I-bera rays in Rat Thyroid

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概要

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• The dose absorbed fraction of rat thyroid by internal deposit of ^<131>I has been calculated as a function of effective diameter of thyroid. The calculations were done using two types of Monte Carlo simulations: one was by a simple energy-loss calculation in spherical volume according to the electron stopping power, and another by a more realistic simulation using Monte Carlo N-Particle Transport code system Version 4A (MCNP). These two calculations were consistent with each other within a deviation of 5%. The absorbed fractions in spherical thyroid were drastically changed up to 5 mm diameter, and then almost all energy was deposited within 10 mm diameter. For the practical application to the animal experiment, the absorbed fractions of ellipsoid-shaped thyroids were also calculated for 1-, 4- and 9-week-old rats, where the fractions were estimated to be 0.61, 0.67 and 0.68, respectively. It was also found that the absorbed fraction of the ellipsoid with various dimensions can be simulated by a calculation for spherical volume with a comparable effective diameter.

• 日本放射線影響学会の論文

著者

• Matsuura Shinya

  Particle Radiation Oncology Research Center Research Reactor Institute Kyoto University

• Kamiya K

  Department Of Genome Repair Dynamics Radiation Biology Center Kyoto University

• Komatsu Kenshi

  Research Institute For Radiation Biology And Medicine Hiroshima University

• ENDO SATORU

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• NITTA YUMIKO

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• OHTAKI MEGU

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• TAKADA JUN

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• STEPANENKO VARELI

  Medical Radiological Research Center, Russian Academy of Medical Sciences

• TAUCHI HIROSHI

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• MATSUURA SYNYA

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• IASKOVA E.

  Medical Radiological Research Center, Russian Academy of Medical Sciences

• HOSHI MASAHARU

  Research Institute for Radiation Biology and Medicine, Hiroshima University

• 高田 純

  Department Of Physics School Of Medicine Sapporo Medical University

• Shinya Matsuura

  Res. Inst. Rad. Biol. Med. Hiroshima Univ.

• Iaskova E.

  広島大学原爆放射能医学研究所

• Iaskova E.

  Medical Radiological Research Center Russian Academy Of Medical Sciences

• 遠藤 暁

  Mechanical System Engineering Graduate School Of Engineering Hiroshima University

• Endo Satoru

  Department Of Biochemistry Cancer Institute Okayama University Medical School

• Ohtaki M

  Hiroshima Univ. Hiroshima Jpn

• Ohtaki Megu

  Department Of Environment And Biometrics Research Institute For Radiation Biology And Medicine Hiros

• Yumiko Nitta

  Research Institute For Radiation Biology And Medicine Hiroshima University

• Nitta Yumiko

  広島大学原爆放射能医学研究所附属国際放射線情報センター

• Nitta Yumiko

  Hiroshima Univ. Hiroshima

• Komatsu Kenshi

  Dep. Of Genome Repair Dynamics Radiation Biology Center Kyoto Univ.

• Ohtaki Megu

  Research Institute For Radiation Biology And Medicine Hiroshima University

• Takada J

  Okayama Univ. Okayama Jpn

• Endo Satoru

  Div. Environ. Biol. Res. Inst. Rad. Biol. And Med. Hiroshima University

• Stepanenko Vareli

  Medical Radiological Research Center Russian Academy Of Medical Sciences

• Hoshi Masaharu

  Research Institute For Nuclear Medecine And Biology Hiroshima University

• Skvortsov Valeriy

  広島大学原爆放射線医科学研究所

• Stepanenko Valeriy

  広島大学原爆放射線医科学研究所

• Takada Jun

  Research Institute For Nuclear Medicine And Biology Hiroshima University

• Tauchi Hiroshi

  Tokyo Institute Of Technology Research Laboratory For Nuclear Reactors

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