A fusion of medical images can be used to enhance the medical diagnosis and treatment of brain pathology. Image fusion has become a popular tool in medical applications to improve image quality. In applications involving medical imaging, image fusion is essential. By assisting radiologists in identifying abnormalities in CT and MR brain images. On many fused images with greater information, a comparison analysis was performed.Medical image fusion in multimodality images like MRI and CT images will enhance the exactness of the image for identifying tumour cells in the brain, as well as provide doctors and clinical treatment designing systems with more information. This paper reviews the comparative analysis of medical image fusion techniques for fusing MRI and CT images to clearly determine brain tumours and help the physician make a better diagnosis. All performance metrics taken into consideration here. The experimental findings showed that the suggested strategies produce better viewing of fused images and produce superior outcomes to a number of currently used conventional algorithms.