title: The tau sign.
authors.affiliation: Department of Radiology, Aultman Hospital, Canton, Ohio, USA. mg4763@hotmail.com
authors.forename: M
authors.initials: M
authors.lastname: Goyal
mesh_terms: D002536:Cerebral Arteries / Q000002:abnormalities*; D006801:Humans; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging