Preliminary evaluation of vector flow and spectral velocity estimation.

Mads Møller Pedersen, Michael Johannes Pihl, Per Haugaard, Jens Munk Hansen, Kristoffer Lindskov Hansen, Michael Bachmann, Jørgen Arendt Jensen

Research output: Contribution to conferencePosterResearchpeer-review

Abstract

Spectral estimation is considered as the golden standard in ultrasound velocity estimation. For spectral velocity estimation the blood flow angle is set by the ultrasound operator. Vector flow provides temporal and spatial estimates of the blood flow angle and velocity. A comparison of vector flow estimation and spectral estimates is presented. The variation of the blood flow angle and the effect on the velocity estimate is investigated. The right common carotid arteries of three healthy volunteers were scanned. Real-time spectral and vector flow data were obtained simultaneously from one range gate line covering the vessel diameter. A commercial ultrasound scanner (ProFocus 2202, BK Medical, Denmark) and a 7.6 MHz linear transducer was used (8670, BK Medical). The mean vector blood flow angle estimations were calculated {52(18);55(23);60(16)}°. For comparison the fixed angles for spectral estimation were obtained {52;56;52}°. The mean vector velocity estimates at PS {76(15);95(17);77(16)}cm/s and at end diastole (ED) {17(6);18(6);24(6)}cm/s were calculated. For comparison spectral velocity estimates at PS {77;110;76}cm/s and ED {18;18;20}cm/s were obtained. The mean vector angle estimates agrees with the spectral flow angle. The vector velocity estimates agrees with the spectral estimates at PS and ED. From preliminary data it is concluded that vector flow angle estimation can replace the operator-dependent angle correction used for spectral velocity estimation.
Original languageEnglish
Publication date2010
Publication statusPublished - 2010
Event10th International Congress on Interventional Ultrasound - Copenhagen, Denmark
Duration: 22 Aug 201025 Aug 2010
Conference number: 10

Conference

Conference10th International Congress on Interventional Ultrasound
Number10
CountryDenmark
CityCopenhagen
Period22/08/201025/08/2010

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