Nowadays, the incidence of cardiovascular diseases is increasing year by year, becoming the number one life-threatening disease. Due to factors such as living habits, diet, family history and living environment, cardiovascular diseases are now becoming younger. . Head and neck CTA — is the CT imaging of the blood vessels of the head and neck, including the aortic arch, bilateral common carotid arteries and branches, vertebral arteries, intracranial arteries, thoracic arteries, head and arm trunks and other major arteries, this examination is mainly for the screening of the causes of cerebrovascular disease, almost including the neurological diseases caused by vascular lesions, such as: intracranial aneurysms, arteriovenous malformations, arterial vascular occlusion The screening of the neurological system for vascular pathologies such as: intracranial aneurysms, arteriovenous malformations, arterial occlusions, carotid stenosis (with analysis of the nature of the plaque), and venous steal. The corresponding symptoms: dizziness, headache, nausea, limb numbness, limb movement restriction, paralysis, coma, drowsiness and other clinical symptoms may be caused by cerebrovascular disease, so the corresponding clinical symptoms should be timely to the hospital, head and neck CTA examination is extremely accurate, convenient and fast, patients can easily accept a screening method, can be viewed from all directions and angles of the vascular image, the use of post-processing technology can get consistent vascular image. Post-processing technology can obtain consistent images of blood vessels and bone, and using surface reconstruction can observe the inside of the lumen, and has a high diagnostic rate for soft and hard plaques and post-stenting follow-up.