Early detection of arteriosclerosis is very important
because arteriosclerosis sometimes causes cerebral
infarction, myocardial infarction, and angina pectoris.
In order to diagnose arteriosclerosis, three dimensional
observation of the inner wall of carotid artery is very
effective. Furthermore, four dimensional visualization
of carotid artery including three special axes and one
temporal axis is expected to give more information
related to arteriosclerosis because carotid artery has
systaltic movement [1, 2].