If it is not possible to do magnetic resonance examination of the brain, head CT, head CTA, cerebral angiography and other examinations of the brain can also be performed. 1. Head CT and enhanced MRI: There is no obvious contraindication, fast scanning, fast results, sensitive to cerebral hemorrhage, especially for acute cerebrovascular patients, it is very important to do head CT. If tumor is considered, it can also be examined by enhanced method. 2. Head CTA: It is mainly used to observe the blood flow of brain tissues, and clinically used to assess whether there are stenosis, plaques, lamina, etc. in blood vessels of the brain. 3. Cerebral angiography: It is mainly used to observe the morphology and lesions of cerebral blood vessels, and can ultimately determine whether the lesion is the blood vessel itself, or whether the lesion is caused by vascular anomalies in other parts of the brain, and it is the gold standard of cerebral vascular imaging. If you want to examine the brain, you need to choose the appropriate examination method under the doctor’s advice, taking into account the symptoms and the degree of illness.