title: Ultrasonic diagnostic techniques.
abstract: This article deals with the physical principles of the Doppler ultrasonography. It also describes the performance specification of present-day ultrasonic devices used in clinical practice to diagnose cerebral vessel disorders. In addition, this article presents typical blood-flow indices for different regions of extra- and intracranial vessels under normal or stenotic conditions.
authors.affiliation: Laboratory of Clinical and Electrophysiological Investigations, I. M. Sechenov Moscow Medical Academy, Russia.
authors.forename: E B
authors.initials: EB
authors.lastname: Khomak
authors.forename: I M
authors.initials: IM
authors.lastname: Tsybin
mesh_terms: D002536:Cerebral Arteries / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging*; D003251:Constriction, Pathologic / Q000000981:diagnostic imaging; D006801:Humans; D018608:Ultrasonography, Doppler / Q000295:instrumentation / Q000379:methods*