The examination methods for cerebrovascular lesions are: 1. General examination: including routine blood, urine, electrocardiogram, cardiac ultrasound, blood lipids, blood biochemistry, blood rheology, etc. to check whether the number of red blood cells and platelets is normal and whether there are heart abnormalities such as atrial fibrillation, which induce cerebral infarction and other lesions; 2. Carotid ultrasound and transcranial Doppler examination: to check whether there is plaque in the carotid artery; 3. CT and magnetic resonance: to make qualitative and localized diagnosis; 4. Cerebral angiography: it is the current gold standard for checking cerebrovascular lesions.