PROBLEM TO BE SOLVED: To provide a medical image diagnostic apparatus which can promptly obtain an appropriate contour by adjusting the setting of a reference point since the apparatus sets a reference point such as a center point of gravity, and can correct another movable point (the second movable point) by synchronizing it with a first movable point based on the positional relationship between the moved movable point (the first movable point) and the reference point.SOLUTION: The medical image diagnostic apparatus includes a medical image generation section that generates a medical image of a subject, a contour setting section that sets the contour of a region of interest in the medical image, a reference point setting section that sets the reference point in the medical image, and a contour correction section that corrects the second movable point of the contour corresponding to the positional relationship between the first movable point of the contour and the reference point.COPYRIGHT: (C)2013,JPO&INPIT【課題】重心点などの基準点を設定し、移動させる可動点(第1の可動点)と基準点の位置関係に基づいて、他の可動点(第2の可動点)を第1の可動点に連動させて修正することができることから、基準点の設定を調整することで、適切な輪郭を速やかに得られる医用画像診断装置を提供する。【解決手段】医用画像診断装置は、被検体の医用画像を生成する医用画像生成部と、前記医用画像における対象領域の輪郭を設定する輪郭設定部と、前記医用画像における基準点を設定する基準点設定部と、前記輪郭の第1の可動点と前記基準点との位置関係に応じて、前記輪郭の第2の可動点を修正する輪郭修正部とを備える。【選択図】図1