Preliminary Experimental Verification of Synthetic Aperture Flow Imaging Using a Dual Stage Beamformer Approach

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    Abstract

    A dual stage beamformer method for synthetic aperture flow imaging has been developed. The motivation is to increase the frame rate and still maintain a beamforming quality sufficient for flow estimation that is possible to implement in a commercial scanner. With the new method high resolution images can be obtained continuously, which will highly increase the frame rate. The flow velocity is estimated by using a time-domain cross-correlation technique. The approach is investigated through experiments with the SARUS scanner (Synthetic Aperture Real-time Ultrasound System). A flow rig generates a parabolic laminar flow, and the SARUS scanner is used for acquiring the data from individual channels of the transducer. The experimental results showed that increasing the number of imaging lines used for the estimation form 4 to 24 reduces the standard deviation from 21% to 7.6%. The parameter study showed that the number of crosscorrelation functions for averaging and length of the search range influence the performance.
    Original languageEnglish
    Title of host publicationIFMBE Proceedings
    EditorsKim Dremstrup, Steve Rees, Morten Ølgaard Jensen
    Number of pages280
    Volume34
    PublisherSpringer
    Publication date2011
    Pages53-56
    ISBN (Print)978-3-642-21682-4
    Publication statusPublished - 2011
    Event15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics - Aalborg, Denmark
    Duration: 14 Jun 201117 Jun 2011
    Conference number: 15
    http://www.dmts.dk/nbc15/

    Conference

    Conference15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics
    Number15
    Country/TerritoryDenmark
    CityAalborg
    Period14/06/201117/06/2011
    Internet address

    Keywords

    • Synthetic aperture flow imaging
    • Synthetic aperture sequential beamforming
    • SARUS

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