JaLCDOI 10.18926/11755
タイトル(別表記) New Stepwedge for Bootstrap Sensitometry in Medical Radiography
フルテキストURL 001_019_027.pdf
著者 吉田 彰| 小橋 利美| 大川 義弘| 三上 泰隆| 平木 祥夫| 東 義晴| 山田 俊治| 杉田 勝彦|
抄録 A new stepwedge has been developed for bootstrap sensitometry, which is used for determining the characteristic curve of radiographic screen/film systems. Since each step of the stepwedge is separated by the lead septum, flare generated under one step will not penetrate the region of another step. The metal of the stepwedge can be changed with various materials. Characteristic curves obtained with new stepwedge bootstrap (NSB) and conventional stepwedge bootstrap (CSB) techniques were compared with those obtained for screen/film systems with inverse sqare sensitometry. The inverse square method was used as the reference standard for accuracy. The NSB method provided characteristic curves that agreed well with those obtained using the inverse square method. The slope of the curve in the CSB method was lower than that in the inverse square or NBS method, because of scatter radiation. The shape of the characteristic curve from the NSB method did not vary with the materials of step metals (aluminum and copper). The cumulative error involved when using the bootstrap method is also discussed.
キーワード Stepwedge Bootstrap Characteristic curves Sensitometry Radiographic screen/film systems
出版物タイトル 岡山大学医療技術短期大学部紀要
発行日 1991-03-25
開始ページ 19
終了ページ 27
ISSN 0917-4494
言語 Japanese
論文のバージョン publisher
NAID 120002313394
著者 中桐 義忠| 山田 俊治| 杉田 勝彦| 三上 泰隆| 大川 義弘| 稲村 圭司| 小栗 宜博| 永谷 伊佐雄| 則安 俊昭| 岡崎 良夫| 井上 信浩| 戸上 泉| 平木 祥夫|
発行日 1990-02
出版物タイトル 岡山医学会雑誌
資料タイプ 学術雑誌論文
著者 中桐 義忠| 三宅 英昭| 杉田 勝彦| 三上 泰隆| 稲村 圭司| 三村 誠一| 大川 義弘| 竹田 芳弘| 平木 祥夫| 藤木 知一| 岸 幹二| 千原 直人|
発行日 1990-10
出版物タイトル 岡山医学会雑誌
資料タイプ 学術雑誌論文