Abstract: Image Processing is popular now a day in every field. The algorithms are keys of various activities in image processing. The medical science is one of the field using image processing called medical imaging. The medical imaging is one of the important tools for diagnosis of diseases inside of body especially delicate part like Brain. Researchers have worked over many algorithms for comparing images of body parts for diagnosis the diseases. Here we will review various algorithms proposed by researcher time in this area of medical imaging.

Keywords: brain disease affected area (Tumour), Region growing, MRI, segmentation, Texture analysis, Edge detection etc.