CT and MRI examinations have their own advantages and disadvantages, and each is suitable for different diseases, so it is impossible to explain who is better. It is especially suitable for patients with skull fractures, cerebral hemorrhage, cranial tumors, inflammatory lesions, congenital malformations, vascular lesions, and calcified diseases, and the value of CT in patients with such diseases is better than that of MRI. For patients with metals in the body, MRI is usually not an option, and CT is advantageous. MRI is more suitable for acute cerebral infarction, encephalitis, demyelinating diseases, arterial tumors, cerebral white matter lesions, hematomas, congenital abnormalities of the brain, and central nervous system diseases, and can more accurately observe the relationship between the lesion and the adjacent blood vessels. In addition, CT has the advantages of shorter examination time, faster results and lower cost, and can be used for obvious occupying lesions. The advantage of MRI is that the instruments are more precise, the images are more detailed, the resolution of soft tissue is stronger, and multi-parameter and multi-directional imaging can be used to detect more subtle lesions, but the cost is relatively higher.