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
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Energy dependence of the GAFCHROMIC LD-V1 in the diagnostic radiographic modalities
掲載誌名	正式名：Journal of Applied Clinical Medical Physics ISSNコード：15269914
掲載区分	国外
出版社	John Wiley & Sons, Inc
著者・共著者	Tatsuhiro Gotanda, Tomoyuki Hasuo, Shinnosuke Nishihara, Kohsei Matsuura, Yasuyuki Kawaji, Hidetoshi Yatake, Shinya Imai, Takuya Akagawa, Nobuyoshi Tanki, Toshizo Katsuda
担当区分	筆頭著者,責任著者
発行年月	2025/05/09
概要	The GAFCHROMIC LD-V1 radiochromic film is widely used in dosimetry because it can provide high-resolution two-dimensional dose distributions without processing. This study aimed to evaluate the response characteristics at different effective energies, from the low-energy range of mammography to the high-energy range of computed tomography. Net pixel value (NPV)-absorbed dose calibration curves for the GAFCHROMIC LD-V1 were generated using x-rays with effective energies of 18, 30, 50, and 80 keV to reflect those used in different diagnostic radiographic modalities. The film response was analyzed using calibration curves at each energy level. The coefficients of determination for the calibration curves at 18, 30, 50, and 80 keV were 0.9992, 0.9997, 0.9999, and 0.9976, respectively. The pixel value change at 30 keV was the largest and most sensitive, while the smallest change in pixel value and lowest sensitivity were noted at 18 keV. Because the energy dependence of the GAFCHROMIC LD-V1 is significant below 18 keV and above 80 keV, it is necessary to establish an appropriate NPV-absorbed dose calibration curve for energies below 18 keV and consider the possibility of underestimating the dose at energies above 80 keV.
DOI	https://doi.org/10.1002/acm2.70117