A method of automatically scoring intravascular calcium. The delineation of a body surface is detected in a tomographic image produced by an X-ray CT system. Images of bones are removed from a field encircled with the delineation of the body surface. The delineations of blood vessels are detected in the tomographic image having the bone images removed therefrom. Calcium is scored using the tomographic image having the bone images removed therefrom. Only the scores of intravascular calcium obtained from the fields inside the delineations of the blood vessels are displayed.