PROBLEM TO BE SOLVED: To provide an image diagnostic apparatus and an image processing method capable of enhancing assuredness when extracting various kinds of blood clot parts generated in a blood vessel.SOLUTION: The image diagnostic apparatus includes: a blood vessel extracting section for extracting the image near the blood vessel including the blood vessel of a subject based on the 3D data of the subject obtained by a modality a target region controlling section arranging target regions respectively corresponding to the face crossing the axis of the blood vessel with a predetermined interval in the axial direction of the blood vessel, dividing the target regions to a plurality of areas, and corresponding the areas between the target regions and a change amount calculating section obtaining the change amount of the areas based on the relation of CT values of the images of the areas corresponded between the target areas base on the brightness values of the images of the areas.COPYRIGHT: (C)2011,JPO&INPIT【課題】血管内に生じる種々の血栓部を抽出するときの確実性を高めることが可能な画像診断装置、及び、画像処理方法を提供する。【解決手段】モダリティにより取得された被検体の3次元データを基に、前記被検体の血管を含む前記血管近傍の画像を抽出する血管抽出部と、前記血管の軸方向に予め定められた間隔をおいて前記血管の軸に対して交わる面にそれぞれ対応させた関心領域を設け、該関心領域を複数の区域に分割し、かつ、前記関心領域間で前記区域を対応付ける関心領域制御部と、前記区域の画像の輝度値を基に、前記関心領域間で対応付けられた前記区域の画像のCT値の関係に基づいて区域の変化量を求める変化量算出部と、を有する。【選択図】図1
