In-vivo evaluation of three ultrasound vector velocity techniques with MR angiography

Kristoffer Lindskov Hansen, Jesper Udesen, Niels Oddershede, Lasse Henze, Carsten Thomsen, Jørgen Arendt Jensen, Michael Bachmann Nielsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


In conventional Doppler ultrasound (US) the blood velocity is only estimated along the US beam direction. The estimate is angle corrected assuming laminar flow parallel to the vessel boundaries. As the now in the vascular system never is purely laminar, the velocities estimated with conventional Doppler US are always incorrect. Three angle independent vector velocity methods are evaluated in this paper: directional beamforming (DB), synthetic aperture flow imaging (STA) and transverse oscillation (TO). The performances of the three methods were investigated by measuring the stroke volume in the right common carotid artery of eleven healthy volunteers, with magnetic resonance phase contrast angiography (MRA) as reference. The correlation between the three vector velocity methods and MRA were: DB/MRA R=0.84 (p<0.01); STA/MRA R=0.95 (p<0.01); TO/MRA R=0.91 (p<0.01). Bland-Altman plots were additionally constructed and mean differences for the three comparisons were: DB/MRA = 0.17 ml; STA/MRA = 0.07 ml; TO/MRA = 0.24 ml. The three US vector velocity techniques yield quantitative insight in to flow dynamics and can potentially give the clinician a powerful tool in cardiovascular disease assessment.
Original languageEnglish
Title of host publicationProceedings of the IEEE Ultrasonics Symposium 2008
Publication date2008
ISBN (Print)978-1-4244-2428-3
Publication statusPublished - 2008
Event2008 IEEE International Ultrasonics Symposium - Beijing, China
Duration: 2 Nov 20085 Nov 2008


Conference2008 IEEE International Ultrasonics Symposium
Internet address
SeriesI E E E International Ultrasonics Symposium. Proceedings


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