PROBLEM TO BE SOLVED: To easily acquire life-sized image information from a radiation conversion panel at an arbitrary position, based on radiation image information that has already been acquired.SOLUTION: A first radiation image capturing apparatus 10A that includes the radiation conversion panel 16 comprises an input device 104 for inputting a first distance from the position of the radiation conversion panel 16 to a position serving as a reference position for a subject at least, a distance measuring means 106 for measuring a second distance from a radiation source to the radiation conversion panel 16, a first radiation field calculating means 108 for determining a radiation field at the position of the radiation conversion panel 16 based on setting information of the radiation source and the second distance, a second radiation field calculating means 110 for determining a hypothetical radiation field at the reference position of the subject based on the setting information of the radiation source, the first distance, and the second distance, and a life-size correcting means 114 for executing life-size correction based on the information of the calculated radiation field and the information of the calculated hypothetical radiation field and turning the radiation image information from the radiation conversion panel 16 to the life-sized image information.COPYRIGHT: (C)2009,JPO&INPIT【課題】一旦入手した放射線画像情報に基づいて、放射線変換パネルから任意の位置における等倍画像情報を簡単に得るようにする。【解決手段】放射線変換パネル16とを有する第1放射線撮影装置10Aにおいて、少なくとも放射線変換パネル16の位置から被検体の基準位置とされる位置までの第1距離を入力する入力装置104と、放射線源から放射線変換パネル16までの第2距離を計測する距離計測手段106と、放射線源の設定情報と第2距離に基づいて放射線変換パネル16の位置での照射野を求める第1照射野算出手段108と、放射線源の設定情報と第1距離と第2距離に基づいて被検体の基準位置での仮想照射野を求める第2照射野算出手段110と、放射線変換パネル16からの放射線画像情報を、算出された照射野の情報と仮想照射野の情報に基づいて等倍補正して等倍画像情報とする等倍補正手段114とを有する。【選択図】図3
