Angiography of the posterior cervicocranial circulation.
D000792:Angiography; D002404:Catheterization; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging*; D013348:Subclavian Artery / Q000000981:diagnostic imaging*; D014711:Vertebral Artery / Q000000981:diagnostic imaging*