Performance of a vector velocity estimator

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 1998

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It is a well-known limitation of all commercially available scanners that only the velocity component along the propagation direction of the emitted pulse is measured, when evaluating blood velocities with ultrasound. Proposals for solving this limitation using several transducers or speckle tracking can be found in the literature, but no method with a satisfactory performance has been found that can be used in a commercial implementation. A method for estimation of the velocity vector is presented. Here an oscillation transverse to the ultrasound beam is generated, so that a transverse motion yields a change in the received signals. The method uses two ultrasound beams for sampling the in-phase and quadrature component of the lateral field, and a set of samples (in-phase and quadrature in both time and space) are taken for each pulse-echo line. These four samples are then used in an autocorrelation approach that yields both the axial and the lateral velocity, and thus the velocity vector. The method has the advantage that a standard array transducer and a modified digital beamformer, like those used in modern ultrasound scanners, is sufficient to obtain the information needed. The signal processing preceding the beamforming can be implemented using standard signal processors, and it is robust since the autocorrelation method is used
Original languageEnglish
Title of host publicationProceeding of the 1998 IEEE Ultrasonics Symposium
Volume1-2
Publication date1998
Pages1489-1493
ISBN (print)0-7803-4096-5
DOIs
StatePublished

Conference

Conference1998 IEEE Ultrasonics Symposium
CountryJapan
CitySendai
Period05/10/9808/10/98
Internet addresshttp://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6171
NameI E E E International Ultrasonics Symposium. Proceedings
ISSN (Print)1051-0117

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Copyright 1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

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