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Related Experiment Videos

High-frequency, nonlinear flow imaging of microbubble contrast agents.

David E Goertz, Andrew Needles, Peter N Burns

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    |April 29, 2005
    PubMed
    Summary

    This study demonstrates high-frequency nonlinear contrast imaging using microbubbles. Researchers developed prototype instrumentation for advanced ultrasound biomicroscopy, enabling detailed flow imaging in microvessels.

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    Area of Science:

    • Biomedical Engineering
    • Ultrasound Imaging
    • Medical Physics

    Background:

    • Nonlinear scattering from microbubble contrast agents is achievable at high frequencies (14-32 MHz).
    • Existing ultrasound biomicroscopy (UBM) systems can be modified for nonlinear contrast imaging.
    • High-frequency ultrasound offers potential for enhanced microvascular imaging.

    Purpose of the Study:

    • To develop and evaluate prototype coherent flow imaging (CFI) instrumentation for nonlinear microbubble imaging.
    • To assess the feasibility of using nonlinear scattering for flow imaging at high frequencies (10-50 MHz).
    • To demonstrate color and power flow imaging capabilities using nonlinear scattering.

    Main Methods:

    • Development of a prototype CFI system for nonlinear microbubble imaging.

    Related Experiment Videos

  • Utilizing transmit frequencies ranging from 10 to 50 MHz.
  • Phantom experiments to validate color and power flow imaging using nonlinear 10 MHz subharmonic scattering induced by a 20 MHz transmit frequency.
  • In vivo imaging of microvessel blood flow in a rabbit ear.

    • Main Results:

    • Successful demonstration of nonlinear scattering-based flow imaging in phantoms.
    • Color and power flow imaging were achieved using nonlinear subharmonic scattering.
    • Feasible in vivo nonlinear contrast imaging of microvessel flow in a rabbit ear was performed.
    • The developed instrumentation operated effectively across the 10-50 MHz frequency range.

    Conclusions:

    • The prototype CFI instrumentation is feasible for nonlinear microbubble imaging at high frequencies.
    • Nonlinear scattering from microbubbles can be effectively utilized for advanced ultrasound flow imaging.
    • This technology shows promise for enhanced visualization of microvascular dynamics.