Real-Time Blood Flow Estimation Using a Recursive Least-Squares Lattice Filter

Paul F. Stetson, Jørgen Arendt Jensen

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    Abstract

    Ultrasonic flow estimation involves Fourier-transforming data from successive pulses. The standard periodogram spectral estimate does not reflect the true velocity distribution in the blood and assumes quasi-stationarity in the data. Last year (see J.A. Jensen et al., IEEE Ultrasonics Symposium Proceedings, p. 1221-4, 1996), the authors demonstrated that a recursive lattice filter can yield results much closer to the correct velocity distribution. They have now implemented it in real time on a system with sixteen ADSP-21060 processors, interfaced to a commercial scanner. The system can perform real-time processing for both the periodogram and lattice-filter approaches and displays both results on a PC for comparison. Results are shown for phantom data and for demodulated data from the aorta and hepatic vein of a healthy subject. This demonstrates under clinical conditions that the lattice filter gives a more realistic velocity distribution and can track rapid changes in the flow
    Original languageEnglish
    Title of host publicationProceedings of the 1997 IEEE Ultrasonics Symposium
    PublisherIEEE
    Publication date1997
    Pages1259-1262
    ISBN (Print)0-7803-4153-8
    DOIs
    Publication statusPublished - 1997
    Event1997 IEEE Ultrasonics Symposium - Toronto, Canada
    Duration: 1 Jan 1997 → …

    Conference

    Conference1997 IEEE Ultrasonics Symposium
    CityToronto, Canada
    Period01/01/1997 → …

    Bibliographical note

    Copyright: 1997 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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