PROBLEM TO BE SOLVED: To acquire a plurality of pieces of energy information on a radiation ray irradiated based on a constant tube voltage, and accurately calculate the number of photons corresponding to each piece of energy information without being affected by the deterioration in measurement accuracy.SOLUTION: A radiographic apparatus includes a detection device having a plurality of detection parts for detecting a radiation ray irradiated based on a constant tube voltage, and a calculation part for acquiring a plurality of pieces of energy information on the radiation ray, and calculating the number of photons corresponding to each piece of energy information based on a result of the detection by each of the plurality of detection parts.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】一定の管電圧に基づいて照射された放射線の複数のエネルギー情報を取得して、各々のエネルギー情報に対応する光子の数を、測定精度の低下の影響を受けることなく高精度に算出すること。【解決手段】放射線撮影装置は、一定の管電圧に基づいて照射された放射線を検出する複数の検出部を有する検出装置と、放射線の複数のエネルギー情報を取得して、各々のエネルギー情報に対応する光子の数を、複数の検出部ごとの検出結果に基づいて計算する計算部と、を備える。【選択図】 図４
