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Author Spotlight: Point-of-Care Ultrasound for Gastric Content Assessment and Risk Stratification in Perioperative Care
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High-Resolution Fast Ultrasound Imaging With Adaptive-Lag Filtered Delay-Multiply-and-Sum Beamforming and Multiline

Grigoriy Zurakhov, Zvi Friedman, David S Blondheim

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    |December 21, 2018
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    New filtered delay-multiply-and-sum (F-DMAS) beamforming with synthetic transmit beamforming (STB) improves cardiac ultrasound contrast. Adaptive-lag F-DMAS further enhances contrast and lateral resolution in cardiac imaging.

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    Area of Science:

    • Medical Imaging
    • Ultrasound Technology
    • Biomedical Engineering

    Background:

    • Multiline acquisition (MLA) is crucial for high-frame-rate cardiac ultrasound.
    • Delay-and-sum (DAS) beamforming is commonly used with MLA.
    • MLA can cause block-like artifacts, often mitigated by synthetic transmit beamforming (STB).

    Purpose of the Study:

    • To evaluate the efficacy of filtered delay-multiply-and-sum (F-DMAS) combined with STB for cardiac ultrasound.
    • To introduce and assess a novel adaptive-lag F-DMAS formulation.
    • To compare these methods against conventional DAS beamforming for contrast and resolution.

    Main Methods:

    • Implemented F-DMAS beamforming with STB-compensated MLA data.
    • Developed and applied an adaptive-lag F-DMAS algorithm.
    • Validated performance using tissue-mimicking phantoms and human cardiac ultrasound data.

    Main Results:

    • F-DMAS with STB-compensated MLA demonstrated superior contrast resolution over DAS beamformed STB and single-line acquisition.
    • The proposed adaptive-lag F-DMAS significantly outperformed both DAS and standard F-DMAS.
    • Improvements in both contrast and lateral resolution were observed with adaptive-lag F-DMAS.

    Conclusions:

    • Combining F-DMAS with STB-compensated MLA offers enhanced contrast in cardiac ultrasound.
    • Adaptive-lag F-DMAS represents a significant advancement, improving both contrast and lateral resolution.
    • These novel beamforming techniques show promise for advanced cardiac ultrasound imaging.