Authors present a systematic review of brain diseases using deep learning techniques. A comparative analysis of recent knowledge that correlates with the detection of brain disorders using deep learning techniques is considered. The diverse strategies which can be a part of Medical Image Processing and are prominently utilized in coming across brain tumors from MRI Images. Brain tumors can be detected manually by experts using the CT scan images. Pre-processing is required to improve the inputted CT scan image. The preprocessing consists of three steps: 1) Grayscale conversion. 2) Resizing the image. 3) Median filtering.