title: Directional Doppler in occlusive cerebrovascular disorders.
mesh_terms: D002340:Carotid Artery Diseases / Q000175:diagnosis; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D002561:Cerebrovascular Disorders / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004301:Doppler Effect; D006801:Humans; D055585:Physical Phenomena; D010825:Physics; D011859:Radiography; D014463:Ultrasonography