MRI has its own huge advantages for the neurological system, as follows: 1) it can examine vascular lesions, such as cerebral infarction, cerebral hemorrhage, and cerebral vascular stenosis resulting in insufficient blood supply, which are all advantages of MRI; 2) if there is a patient with trauma, after the patient has done CT examination, no obvious bleeding can be seen, but the clinical symptoms are obvious, then doing MRI may also 3, the advantages of brain infection, such as viral encephalitis, bacterial encephalitis and tuberculous meningitis, will be clearly shown on MRI; 4, the degenerative diseases of the brain, such as Parkinson’s and Alzheimer’s disease. Because of the aging society, this is a geriatric disease, patients with progressive dementia, dementia gradually aggravated or forgetfulness, when the MRI may be found; 5, for congenital diseases, such as children may have seizures, or feel that the development of intelligence than children of the same age backward, when the MRI may be found; 6, demyelinating lesions, this lesion has a wide range, due to infection This kind of lesion has a vast scope, due to infection, poisoning, etc., can be manifested as demyelination, which is the advantage of magnetic resonance. Therefore, MRI has a greater advantage in brain examination, and is a routine neurological examination.