PROBLEM TO BE SOLVED: To obtain a two-dimensional projection image on any image surfaces of a longitudinal subject easily, and to reduce the medical processes using a radiation image capturing apparatus effectively.SOLUTION: This radiation image capturing apparatus includes a tomosynthesis image capturing device 12 having a tomosynthesis control mechanism 24 for moving a radiation source 14 and a radiation conversion panel 18, which are disposed on the respective opposite sides of a subject 16, respectively in reverse directions in synchronism with each other, a longitudinal direction moving mechanism 28 for moving an image capturing range of the tomosynthesis image capturing device 12 in a longitudinal direction of the subject 16, a three-dimensional image reconstructing means 30 for generating a three-dimensional image from a plurality of radiation image information captured in an image capturing range, a three-dimensional image joining means 32 for joining a plurality of three-dimensional images generated by the three-dimensional image reconstructing means 30 with respect to a plurality of image capturing ranges, in the longitudinal direction of the subject 16, and a projection image generating means 34 for generating a two-dimensional projection image on an arbitrarily set image plane based on a joined three-dimensional image.COPYRIGHT: (C)2009,JPO&INPIT【課題】長尺の被検体の任意の像面における二次元投影画像を容易に得るようにして、放射線撮影装置を使用した医療作業の短縮化を有効に図る。【解決手段】放射線源14と放射線変換パネル18とを被検体16を挟んで互いに反対方向に同期移動させるトモシンセシス制御機構24とを有するトモシンセシス撮影装置12と、トモシンセシス撮影装置12による撮影範囲を被検体16の長尺方向に移動する長尺移動機構28と、1つの撮影範囲で撮影された複数の放射線画像情報から1つの三次元画像を得る三次元画像再構成手段30と、複数の撮影範囲に対応して得られた三次元画像再構成手段30からの複数の三次元画像を被検体16の長尺方向に合わせて連結する三次元画像連結手段32と、連結後の三次元画像に基づいて、任意に設定される像面での二次元投影画像を作成する投影画像作成手段34とを有する。【選択図】図1
