PROBLEM TO BE SOLVED: To provide an image processing device that diagnoses images in a high-accuracy medical image diagnostic device which generates several hundreds of images, in a short time.SOLUTION: The image processing device for performing, based on three-dimensional original images, image processing for displaying a projection image obtained by projecting the three-dimensional original images to a projection plane in a predetermined direction includes: a setting means which classifies the plurality of original tomographic images into a plurality of groups by a predetermined number of sheets in a laminating direction and a means which performs, for each of the plurality of groups set by the setting means and for each of the original tomographic images constituting one group, predetermined processing on pixel values of pixels for the number of sheets of one group located in the laminating direction of each of the original tomographic image to thereby form the projection image of the predetermined direction.COPYRIGHT: (C)2011,JPO&INPIT【課題】数百枚単位の画像を生成する高精度の医用画像診断装置における画像を読影する際に、短時間での読影が可能となる画像処理装置を提供する。【解決手段】三次元原画像に基づいて、前記三次元原画像を所定方向から投影面に投影した投影画像を表示する画像処理を行う画像処理装置であって、前記複数枚の原断層像を積層方向にて所定枚数毎の複数のグループに区分する設定を行う設定手段と、前記設定手段にて設定された前記複数のグループ毎に、1グループを構成する各前記原断層像に対し、各前記原断層像の積層方向上にある1グループ枚数分のピクセルの画素値に対して所定の処理を施すことで所定方向の投影画像を作成する。【選択図】図11
