I. Introduction
Imaging is an essential part in medical centres to visualize spoiled portion that exists in medical images obtained through frame grabbers, camera, etc. Popular edge detection techniques (Sobel detector, Robert Cross detector, Canny edge detector, Zero-based detection) can extract boundaries. But due to abrupt change in brightness levels of image in MRI images, we cannot get the correct and smooth edges. Hence medical images have been segmented using fuzzy set theory [1] deals with clustering of images into several regions.