Cranial collateral pathways in stroke syndrome.
D002339:Carotid Arteries / Q000000981:diagnostic imaging; D002533:Cerebral Angiography; D002536:Cerebral Arteries; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging*; D002941:Circle of Willis / Q000000981:diagnostic imaging; D006801:Humans; D008576:Meningeal Arteries / Q000000981:diagnostic imaging