Today image handling assumes an imperative part in medical field and medical imaging is a developing and testing field. Medical imaging is invaluable in finding of the infection. Many people suffer from brain tumor it is a serious and dangerous disease. Medical imaging provides proper diagnosis of brain tumor. There are numerous systems to identify brain tumor from MRI images. These strategies face challenges like finding the location and size of the tumor. To detect the tumor from the brain is

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... most important and difficult part, image segmentation is used for this. Already, various algorithms are developed for image segmentation. In this review paper cover the basic terminologies of brain tumor and MRI images, and also survey of various brain tumor segmentation startegies.