PROBLEM TO BE SOLVED: To enable the images of an artery and an artery to clearly be provided when reconstructing non-contrast blood vessel image even if difference of blood velocity between the artery and the vein is small.SOLUTION: A phase image of the diastole and a phase image of the systole are obtained from diastolic image and systolic image of the subject respectively, to produce the phase mask from the phase image of the systole and the phase image of the diastole. The mask processing is performed on the systolic image or the diastolic image using the phase mask, and the artery image is obtained on the basis of an image after the mask processing.COPYRIGHT: (C)2013,JPO&INPIT【課題】 非造影血管像を再構成する際に、動脈と静脈の血流速度の差が小さくても、良好に動脈と動脈を描出可能にする。【解決手段】 被検体の拡張期画像から拡張期の位相画像を、収縮期画像から収縮期の位相画像をそれぞれ得て、収縮期の位相画像と拡張期の位相画像とから位相マスクを作成し、位相マスクを用いて収縮期画像又は拡張期画像をマスク処理し、マスク処理後の画像に基づいて、動脈画像を求める。【選択図】 図4
