II. PROCEDURE AND RELATED THEORIES
A. Medical principle in CT Scan diagnosis
CTP is a blood brain status checking method after the
injection of contrast media, which is expected to be clogged
by checking average time of blood in brain at the point that
needed to be considered. Afterward, apply the information
to create images and show CBV , CBF and MTT in order
to specify Ischemic Stroke Area, so the doctor could have a
treatment on time.