A cardiac cavity region is extracted from a three dimensional functional image that represents evaluation index data of cardiac functions, and a cardiac function bulls eye image that represents the functions of the cardiac cavity is generated. Coronary artery image data are extracted from three dimensional anatomical images that represents the structures of the heart and the coronary artery, and coronary article closed surfaces that include the extracted coronary artery image data are calculated. A coronary artery bulls eye image is generated form the extracted coronary artery image data, and distances from the boundary surface of the cardiac cavity region to the coronary artery closed surfaces are calculated. Display output is controlled such that the cardiac function bulls eye image, the coronary artery bulls eye image, and data representing the distances are displayed simultaneously on the screen of a display device.