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Kataoka, Noriaki*; Nakajima, Junya; Miwa, Kazuji; Hirota, Seiko*; Tsubota, Yoichi; Yamada, Ryohei; Fujimichi, Yuki*; Ishikawa, Junya*; Sunaoshi, Masaaki*
Hoken Butsuri (Internet), 54(2), p.140 - 145, 2019/06
It is the written report of the joint meeting of young researchers in the field of radiation protection and radiation biology.
Akahane, Keiichi*; Iimoto, Takeshi*; Ichiji, Takeshi*; Iwai, Satoshi*; Oguchi, Hiroyuki*; Ono, Kazuko*; Kawaura, Chiyo*; Tatsuzaki, Hideo*; Tsujimura, Norio; Hamada, Nobuyuki*; et al.
Hoken Butsuri, 49(3), p.153 - 156, 2014/09
A brief review is given of the history and methodology of external dosimetry for the lens of the eye. Under the 1989 revision to domestic radiological protection regulations, the concept on the effective dose equivalent and the dose limit to the lens of the eye (150 mSv/y) both introduced in ICRP 1977 recommendations has changed nationwide the external monitoring methodology in non-uniform exposure situations to the trunk of a radiological worker. In such situations, often created by the presence of a protective apron, the worker is required to use at least two personal dosemeters, one worn on the trunk under the apron and the other, typically, at the collar over the apron. The latter dosemeter serves the dual purpose of providing the dose profile across the trunk for improved effective dose equivalent assessment and of estimating the dose to lens of the eye. The greater or appropriate value between 
(10) and (0.07), given by the dosemeter, is generally used as a surrogate of (3).
Hamada, Nobuyuki*; Sakashita, Tetsuya; Hara, Takamitsu*; Fujimichi, Yuki*
Hoshasen Seibutsu Kenkyu, 49(3), p.318 - 331, 2014/09
Over the past half century, a colony formation assay has been most commonly used to evaluate cellular radiosensitivity. Our colony formation assay of primary normal human diploid fibroblasts and the analysis of the size and cell numbers in abortive colonies comprising 
50 cells and clonogenic colonies comprising 
50 cells led to observations that can potentially answer a fundamental question of what is actually being evaluated in the colony formation assay, and a new phenomenon was also unveiled with the colony formation assay whereby the higher the dose the larger the size of colonies arising from irradiated primary normal human diploid ocular lens epithelial cells. This paper shall review these findings.
Kono, Takahiko; Ogino, Haruyuki*; Tani, Kotaro*; Fujimichi, Yuki*; Hokama, Tomonori
Hoken Butsuri, 46(3), p.227 - 231, 2011/09
no abstracts in English
Ogino, Haruyuki*; Tani, Kotaro*; Kono, Takahiko; Shimada, Kazumasa*; Fujimichi, Yuki*
Hoken Butsuri, 46(3), p.197 - 204, 2011/09
no abstracts in English
Kono, Takahiko; Ogino, Haruyuki*; Fujiwara, Keiko*; Moriya, Koichi*; Fujimichi, Yuki*; Koike, Yuya*
no journal, ,
no abstracts in English
Kono, Takahiko; Ogino, Haruyuki*; Koike, Yuya*; Fujiwara, Keiko*; Shimada, Kazumasa*; Tani, Kotaro*; Fujimichi, Yuki*
no journal, ,
no abstracts in English
Ogino, Haruyuki*; Kono, Takahiko; Shimada, Kazumasa*; Tani, Kotaro*; Fujimichi, Yuki*
no journal, ,
no abstracts in English
