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Proceedings Paper

Lateral velocity estimation bias due to beamforming delay errors (Conference Presentation)
Author(s): Alfonso Rodriguez-Molares; Solveig Fadnes; Abigail Swillens; Lasse Løvstakken

Paper Abstract

An artefact has recently been reported [1,2] in the estimation of the lateral blood velocity using speckle tracking. This artefact shows as a net velocity bias in presence of strong spatial velocity gradients such as those that occur at the edges of the filling jets in the heart. Even though this artifact has been found both in vitro and in simulated data, its causes are still undescribed. Here we demonstrate that a potential source of this artefact can be traced to smaller errors in the beamforming setup. By inserting a small offset in the beamforming delay, one can artificially create a net lateral movement in the speckle in areas of high velocity gradient. That offset does not have a strong impact in the image quality and can easily go undetected.

Paper Details

Date Published: 2 May 2017
PDF: 1 pages
Proc. SPIE 10139, Medical Imaging 2017: Ultrasonic Imaging and Tomography, 101390J (2 May 2017); doi: 10.1117/12.2255908
Show Author Affiliations
Alfonso Rodriguez-Molares, Norwegian Univ. of Science and Technology (Norway)
Solveig Fadnes, Norwegian Univ. of Science and Technology (Norway)
Abigail Swillens, Ghent Univ. (Belgium)
Lasse Løvstakken, Norwegian Univ. of Science and Technology (Norway)

Published in SPIE Proceedings Vol. 10139:
Medical Imaging 2017: Ultrasonic Imaging and Tomography
Neb Duric; Brecht Heyde, Editor(s)

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