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

Paul F. Stetson, Jørgen Arendt Jensen

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    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
    Publication date1997
    ISBN (Print)0-7803-4153-8
    Publication statusPublished - 1997
    Event1997 IEEE Ultrasonics Symposium - Toronto, Canada
    Duration: 1 Jan 1997 → …


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

    Bibliographical note

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