title: Invited commentary.
authors.forename: William C
authors.initials: WC
authors.lastname: Mackey
mesh_terms: D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging; D016893:Carotid Stenosis / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003287:Contrast Media; D018450:Disease Progression; D006801:Humans; D020766:Intracranial Embolism / Q000209:etiology; D011237:Predictive Value of Tests; D011859:Radiography; D012075:Remission, Spontaneous; D013997:Time Factors; D018615:Ultrasonography, Doppler, Color
chemical_list: D003287:Contrast Media