title: [Directional Doppler ultrasonography (DDS): theoretical bases and clinical methods].
mesh_terms: D001783:Blood Flow Velocity; D002561:Cerebrovascular Disorders / Q000175:diagnosis*; D004301:Doppler Effect; D006801:Humans; D055585:Physical Phenomena; D010825:Physics; D014463:Ultrasonography; D014652:Vascular Diseases / Q000175:diagnosis*
vernacular_title: L'ultrasonografia Doppler direzionale (DDS): basi teoriche e metodologia clinica