Medical image display apparatus

A medical image display apparatus comprising:

• a memory configured to store data of a plurality of medical images;
• a display configured to display the medical images on a screen;
• and
• control circuitry configured to cause the display to perform switchable display so that the medical images are displayed one by one at a same position on the screen,
• wherein the control circuitry controls the display under:
• a first rule in which the switchable display is performed for a same slice position using, among the medical images, different-type medical images covering a same region of a subject, the display being configured to (a) automatically unify position, size and directional orientation of a same anatomical region of interest (ROI) within each of a plurality of same slice position medical images obtained by different types of medical imaging techniques and (b) switchably display the unified medical images one-by-one in a same size, position and directional orientation on the screen;
• and
• a second rule in which the switchable display is performed for different slice positions using, among the medical images, same-type medical images covering the same region of the subject, the display being configured to (a) automatically unify size and directional orientation of a same anatomical ROI within each of a plurality of different slices of medical image obtained by a same type of medical imaging technique and (b) switchably display the unified medical images of different slice positions one-by-by in a same size, position and directional orientation on the screen.