PROBLEM TO BE SOLVED: To provide a medical image processor and a medial image processing method for supporting an operation to set a point at an arbitrary three-dimensional position with respect to a three-dimensional medical image.SOLUTION: When a mouse-down operation (operation to continuously depress the button switch of a mouse) is performed on a three-dimensional medical image 20 in the case of setting a point on the three-dimensional medical image 20, a CPU 101 moves the point in a depth direction. In this case, the CPU 101 calculates the concentration gradient of the depth direction of the three-dimensional medical image 20. For example, in an organ center setting mode, when the concentration gradient becomes small, the point is slowly moved, and when the concentration gradient is large, the point is quickly moved.COPYRIGHT: (C)2013,JPO&INPIT【課題】 3次元医用画像に対し、任意の3次元位置に点を設定する操作を支援する医用画像処理装置及び医用画像処理方法を提供する。【解決手段】 3次元医用画像20に点を設定する際、3次元医用画像20上でマウスダウン操作(マウスのボタンスイッチを押下し続ける操作)が行われると、CPU101は、点を奥行方向へ移動する。このときCPU101は3次元医用画像20の奥行方向の濃度勾配を求め、例えば臓器中心設定モードでは、濃度勾配が小さくなるところで点を低速に移動し、濃度勾配が大きいところで点を高速に移動する。【選択図】図3