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Ultrafast Focused High Frequency Power Doppler Imaging

  • Author / Creator
    Ma, Bingjie
  • High-frequency ultrasound (>20MHz) offers promising opportunities for high-resolution blood flow imaging of the microcirculation at superficial depths owing to high backscatter coefficient and high resolution. Because time-of-flight is minimal at these superficial depths, focused beam scanning can be done very rapidly. Ultrafast focused beam scanning is compared with traditional Doppler sequences and plane-wave imaging. Compared with traditional Doppler, ultrafast focused beam scanning is shown to offer improved sensitivity to slow flows because of higher ensemble size within an equivalent data acquisition time. Compared with plane wave imaging and plane wave compounding, ultrafast focused beam scanning is shown to exhibit lower variance and improved SNR given comparable transmit voltage levels.

  • Subjects / Keywords
  • Graduation date
    Fall 2018
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3DB7W61M
  • License
    Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.