title: [Transcranial color-coded duplex ultrasound--possibilities and limits of this method in comparison with conventional transcranial Doppler ultrasound].
abstract: The purpose of this report is to describe, based on the experience with 50 patients, transcranial colour-coded duplex ultrasonography and to evaluate its practical potential in the routine examination in comparison with conventional transcranial Doppler ultrasonography. Under visual control, the Doppler angle between the ultrasonic beam and the flow direction can be adjusted. The mean angle of incidence in the middle cerebral artery was 33 degrees +/- 15 degrees, in the anterior cerebral artery 35 degrees +/- 17 degrees, in the posterior cerebral artery 45 degrees +/- 18 degrees and in the basilar artery 15 degrees +/- 14 degrees. The measurements of blood flow velocity under consideration of the angle of incidence resulted in 15%, 18%, 30% and 3% respectively higher velocity values. Examples of pathologic findings demonstrate the practical potential of this noninvasive method.
authors.affiliation: Abteilung für Neurologie, Städtisches Krankenhaus München-Bogenhausen.
authors.forename: E
authors.initials: E
authors.lastname: Bartels
mesh_terms: D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity / Q000502:physiology; D001921:Brain / Q000098:blood supply; D002545:Brain Ischemia / Q000000981:diagnostic imaging; D001932:Brain Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging*; D004453:Echoencephalography; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D017585:Ultrasonography, Doppler, Transcranial; D014715:Vertebrobasilar Insufficiency / Q000000981:diagnostic imaging
vernacular_title: Transkranielle farbkodierte Duplexsonographie--Möglichkeiten und Grenzen der Methode im Vergleich zur konventionellen transkraniellen Dopplersonographie.