Indications】 1. Intracranial and extracranial vascular lesions. Such as hemorrhagic or occlusive cerebrovascular lesions. 2.Spontaneous intracerebral hematoma or subarachnoid hemorrhage (SAH) etiology examination. 3.For blood-rich tumors of the head and face, preoperative understanding of the blood supply condition. 4.To observe the relationship between blood supply and adjacent blood vessels of intracranial occupying lesions and the characterization of certain tumors. 5.Review after treatment of head, face and intracranial vascular diseases. Contraindications】 1.Iodine allergy (after desensitization treatment, or use of iodine-free contrast agent). 2.Patients with serious bleeding tendency or bleeding disorders. 3) Severe cardiac, hepatic or renal insufficiency. 4) Late brain herniation and brainstem failure. Preoperative preparation】 1. Routine preoperative examination: including blood, urine routine, blood bleeding and clotting time, liver and kidney function, electrocardiogram and chest X-ray. 2, 8h preoperative diet, special circumstances, such as emergency can be shortened at the discretion of the anesthesiologist. 3.Iodine allergy test: 1ml of contrast agent to be used for imaging, intravenous push. The test should be negative if there are no signs of allergy such as panic, shortness of breath, urticaria and bulbar conjunctival congestion, and if the blood pressure pulsation is less than 10~20mmHg before and after the injection. If the iodine allergy test is positive and it is necessary to perform contrast, hormone therapy should be performed 3 d before surgery and non-ionic iodine aqueous contrast preparation should be used as much as possible. 4.Bilateral inguinal and perineal area skin preparation: Patients with long operation time should have indwelling catheter. 5.Inject intramuscular phenobarbital 30min before operation. 6.Continuous intravenous administration of calcium antagonist 24h before surgery, if appropriate. 7.Apparatus preparation 1 angiographic surgical kit, 2 pressure bags, 500ml×4 bags of soft packing isotonic saline, 1 Y-shaped valve, 2 tee connectors, 1 cerebral angiographic catheter (5F or 4F, choose a different shape of angiographic catheter for tortuous vessels as appropriate), 1 catheter sheath (5F, 6F), 1 short guidewire of 30cm and 1 long guidewire of 160cm each. High pressure syringe and connecting tube, 100~200ml of contrast medium. Puncture needle (16G or 18G for adults, 18G or 20G for children).