PROBLEM TO BE SOLVED: To provide a method which does not require an exposure to radiation for generating a scatter ratio image.SOLUTION: X-rays are emitted to and transmitted through a material that is equivalent to a subject, and an output Cn of the X-ray that has passed through a slit and an output Cb of the X-ray that has not passed through the slit are respectively detected. Next, a scatter ratio by the material that is equivalent to a subject is obtained from the ratio between the output Cn and the output Cb. Then, a subject is exposed to X-rays, and an image of the subject is generated based on X-ray data obtained by detecting the X-ray that transmits through the subject. Based on the scatter ratio by the material that is equivalent to a subject, the scatter ratio image is generated from the image of the subject.COPYRIGHT: (C)2013,JPO&INPIT【課題】散乱割合画像作成のための被曝を必要としない方法を提供すること。【解決手段】まずX線を被写体等価物質に照射して透過させ、スリットを経たX線の出力Cnと、スリットを経ないX線の出力Cbをそれぞれ検出する。次に、前記出力Cnと前記出力Cbの比から前記被写体等価物質による散乱割合を求める。次に、被写体をX線により照射し、該被写体を透過するX線を検出することにより得られるX線データに基づいて、前記被写体の画像を生成する。次に、前記被写体等価物質による散乱割合に基づき、前記被写体の画像から散乱割合画像を生成する。【選択図】図5
