title: [Pseudo-stenosis of the renal artery: a possible defect of color Doppler sonography].
abstract: The diagnostic value of pulsed Doppler sonography for the detection of renal artery stenosis was questioned by recent studies. Until now, the diagnostic value of colour-coded Doppler sonography of the renal arteries is not clearly defined in relation to pulsed Doppler. This study deals with specific problems of colour-coded Doppler sonography in the examination of the renal arteries. Because of basic technical principles of colour-coded Doppler sonography a stenosis can be imitated especially at the origin of the right renal artery by using a ventral approach to the vessel. This pseudo-stenosis is due to a change of colour similar to an aliasing-phenomenon in a curved vessel. In order to avoid false positive results, a laterodorsal approach to the vessel should be applied additionally. A spectral waveform should be also registered routinely.
authors.affiliation: Universitätsklinik für Radiodiagnostik Wien.
authors.forename: P
authors.initials: P
authors.lastname: Hübsch
authors.forename: M
authors.initials: M
authors.lastname: Breitenseher
authors.forename: S
authors.initials: S
authors.lastname: Trattnig
authors.forename: M
authors.initials: M
authors.lastname: Baldt
authors.forename: D
authors.initials: D
authors.lastname: Pölzleitner
mesh_terms: D000328:Adult; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012078:Renal Artery Obstruction / Q000000981:diagnostic imaging*; D014465:Ultrasonics; D014463:Ultrasonography
vernacular_title: Pseudostenose der Nierenarterien: Mögliche Fehler der Farbdopplersonographie.