The cardio vascular system of the human body consists of a large number of blood segments with various properties, and thus, the pulsating blood flow of the human body is extremely complicated. The blood flow along with the blood pressure is of equal importance. It describes the supply of blood in various parts of the body. Recently, various techniques have been developed for analysis of blood flow. These analyses detect abnormalizes in blood vessels such as: aneurysms, clots etc. This proposed paper provides a method used in image processing to detect an abnormal blood vessel.