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   教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Eye lens dose distribution in neonatal head CT: An analysis of the scanning conditions and CTDIvol limitations
掲載誌名	正式名：Radiation Protection Dosimetry 略　 称：Radiat Prot Dosimetry
掲載区分	国外
出版社	Oxford University Press
巻・号・頁	ncag046
著者・共著者	Tatsuhiro Gotanda, Takuya Akagawa, Tomoyuki Hasuo, Shinnosuke Nishihara, Kohsei Matsuura, Yasuyuki Kawaji, Hidetoshi Yatake, Shinya Imai, Rumi Gotanda, Toshizo Katsuda
担当区分	筆頭著者,責任著者
発行年月	2026/05/18
概要	Despite neonatal radiosensitivity, accurate lens dose assessments in computed tomography (CT) are lacking. We assessed the neonatal head CT eye lens dose under various scanning conditions, including vertical table displacement and organ-based exposure modulation (OEM), using the GAFCHROMIC LD-V1 (LD-V1), which can measure two-dimensional dose distributions, and we evaluated the limitations of conventional dose indices. The lens dose decreased with increasing distance from the isocentre for the Canon 320. Whereas, for the Canon 80 and Siemens, the dose peaked at +25 mm and then decreased. For the OEM, the dose reduction effect decreased at 30°. The CT dose index volume remained consistent. Spatially resolved dosimetry using the LD-V1 reveals beam overlap and positioning-related dose anomalies that cannot be captured by point dosimeters or conventional indices. The LD-V1 can effectively evaluate superficial dose distributions and guide dose optimization in neonatal imaging.