Cerebrovascular disease is a series of diseases that cause brain damage due to obstruction, rupture, abnormal development or abnormal function of cerebral blood vessels. It is characterized by high morbidity, mortality, disability and recurrent attacks, and has become the number one disease that seriously threatens human health. The attack of cerebrovascular disease is often very sudden and extremely dangerous, and the condition may deteriorate sharply within a short period of time, threatening life. Once an attack occurs, the only way to save life and preserve function is to arrive at a hospital that is equipped to treat it in the shortest possible time. In fact, most cerebrovascular diseases, such as subarachnoid hemorrhage due to intracranial aneurysm, cerebral hemorrhage due to arteriovenous malformation, cerebral infarction due to severe cerebral arteriosclerosis stenosis, etc., may have mild symptoms such as headache, dizziness, blurred vision, weakness of hands and feet before the onset. At this time, if relevant examinations are carried out in a hospital in time, the above diseases can be detected early through existing non-invasive examination means (such as CTA, MRA, etc.), and most of them can be completely cured through minimally invasive treatment methods. The proportion of such diseases that are diagnosed and treated before the onset is as high as 70-80% in developed countries such as Europe and the United States, but only about 5% in China at present. This shows that for cerebrovascular diseases, the examination and prevention before the onset of the disease are far more important than the treatment after the onset of the disease. Therefore, cerebrovascular disease is not terrible, early diagnosis and treatment is the key.