A medical imaging apparatus includes a cardiac lumen region identifying unit, a myocardium identifying unit, and a generating unit. The cardiac lumen region identifying unit is configured to identify a cardiac lumen region from a medical image including a heart region. The myocardium identifying unit is configured to identify a face of a myocardium region obtained by extending a face of the cardiac lumen region, identified by the cardiac lumen region identifying unit, by a certain distance toward a myocardium side. The generating unit is configured to generate a color-coded image in which the face of the myocardium region, identified by the myocardium identifying unit, is colored in colors according to signal values of the medical image corresponding to positions on the face of the myocardium region.