PROBLEM TO BE SOLVED: To make it possible to visually recognize the three-dimensional structure of a blood vessel or a lumen and to reflect the color of a color Doppler image or the like with good appearance.SOLUTION: In this ultrasonic image display method, a B mode image and a 3D image reversed in the degree of brightness are formed on the basis of B mode data and the color based on color Doppler data is reflected only with respect to the pixel of the 3D image becoming a predetermined value or below in brightness in the B mode image to form a color superposed 3D image. Accordingly, the three-dimensional structure of the blood vessel or the lumen is expressed by white on a black background and becomes easy to visually recognize. The protrusion of a color from the part of the blood vessel or lumen is provided and the blood vessel or the lumen can be colored with good outward appearance. The blood vessel (having a blood flow) and the lumen (having no blood flow) can be easily discriminated from each other.COPYRIGHT: (C)2008,JPO&INPIT【課題】血管や腔の3次元的構造を視認可能にすると共にカラードプラ画像などのカラーを見栄え良く反映させる。【解決手段】Bモード・データに基づいてBモード画像と輝度の高低を反転した3D画像を作成し、Bモード画像では輝度が所定値以下になる3D画像の画素についてのみカラードプラモード・データに基づくカラーを反映させてカラー重畳3D画像を作成する。【効果】黒い背景に血管や腔の3次元的構造が白く浮き出し、3次元的構造を視認し易くなる。血管や腔の部分からカラーがはみ出すことがなく、見栄え良く色付けすることが出来る。血管(血流がある)と腔(血流がない)とを容易に識別することが出来る。【選択図】図6
