Clinical Research Directory

Inclusion Criteria: 1. Age between 18 and 75 years; 2. Suspected vascular lesions in the head and neck, or other conditions involving head and neck vessels requiring whole-brain angiography for definitive diagnosis or to aid treatment decisions. Including but not limited to: intracranial aneurysms, arteriovenous malformations, cavernous malformations, arteriovenous fistulas, Moyamoya disease, Moyamoya syndrome, subarachnoid hemorrhage, symptomatic intracranial artery stenosis/occlusion, stenosis/occlusion of the carotid/subclavian/vertebral arteries, acute/ chronic subdural hematoma, etc; 3. American Society of Anesthesiologists (ASA) physical status classification I-III (no severe cardiopulmonary dysfunction); 4. Patients who voluntarily participate in this study and sign an informed consent form. Exclusion Criteria: 1. Patients who are to undergo surgery at the same time as cerebral angiography; 2. Renal dysfunction (serum creatinine \> 133 μmol/L or estimated glomerular filtration rate \< 60 mL/min/1.73 m²); 3. Patients with known allergy to iodinated contrast media; 4. Coagulation disorders (prothrombin time \>16s, activated partial thromboplastin time \>45s, or platelet count \<100×10⁹/L); 5. Severe infection, skin ulceration, or vascular anatomical abnormalities at the puncture site (e.g., bilateral femoral artery occlusion); 6. Pregnant or lactating women; 7. Patients with severe cognitive impairment; 8. Patients with psychiatric disorders; 9. Patients unable to undergo head magnetic resonance imaging (MRI), e.g., those with metallic implants, claustrophobia, or other contraindications; 10. Patients with other severe advanced or terminal illnesses; 11. Patients currently participating in other clinical trials.