ゴタンダ　タツヒロ   Tatsuhiro Gotanda   五反田　龍宏    所属   川崎医療福祉大学  医療技術学部 診療放射線技術学科    職種   准教授
言語種別	英語
発表タイトル	DOSIMETRY USING A RADIOCHROMIC FILM AND A MAMMOGRAPHY PHANTOM
会議名	6th European Congress on Radiation Protection
主催者	International Radiation Protection Association
学会区分	国際学会及び海外の学会
発表形式	ポスター掲示
講演区分	一般
発表者・共同発表者	◎Tatsuhiro Gotanda, Yasuyuki Kawaji, Hidetoshi Yatake, Shinya Imai, Takuya Akagawa, Toshizo Katsuda
発表年月日	2022/05/31
開催地 （都市, 国名）	Budapest, Hungary
概要	Mammography is one of the most effective diagnostic methods for the early detection of breast cancer; however, it poses the risk of radiation exposure. To date, mammography dosimetry has been performed according to the mean glandular dose; however, the actual exposure in the breast has not been assessed. We have measured dose distributions and depth doses using both radiochromic films and mammographic phantoms; three-dimensional intra-mammary dose assessment was conducted. The absorbed dose distribution at the surface was markedly higher on the chest-wall side but lower on the nipple side. The absorbed doses in the depth direction exponentially decreased. The glandular tissue near the surface may be irradiated with an absorbed dose of 7.0 mGy or higher. Since EBT3 could be placed inside the phantom, the absorbed dose inside the breast could also be evaluated in three dimensions.