title: The utility of image-directed Doppler ultrasound in the evaluation of the "parallel channel" sign.
authors.affiliation: Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts 02115.
authors.forename: H M
authors.initials: HM
authors.lastname: Levy
authors.forename: G R
authors.initials: GR
authors.lastname: Dobkin
authors.forename: P M
authors.initials: PM
authors.lastname: Doubilet
mesh_terms: D000328:Adult; D001653:Bile Ducts, Intrahepatic / Q000473:pathology*; D003937:Diagnosis, Differential; D004108:Dilatation, Pathologic; D005260:Female; D006499:Hepatic Artery; D006801:Humans; D014463:Ultrasonography; D014652:Vascular Diseases / Q000175:diagnosis