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
  • Degree
    Master of Science
  • DOI
  • License
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