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Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
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Related Experiment Video

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Blood Flow Imaging with Ultrafast Doppler
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FoCUS: Fourier-Based Coded Ultrasound.

Almog Lahav, Tanya Chernyakova, Yonina C Eldar

    IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    |October 10, 2017
    PubMed
    Summary

    This study introduces an efficient coded excitation (CE) method for ultrasound array imaging. Integrating pulse compression into frequency domain beamforming significantly reduces computations, enhancing SNR and imaging depth without compromising resolution.

    Area of Science:

    • Medical Imaging
    • Ultrasound Technology
    • Signal Processing

    Background:

    • Conventional ultrasound imaging uses single-carrier short pulses for transducer excitation.
    • Coded excitation (CE) with pulse compression enhances transmitted energy, signal-to-noise ratio (SNR), and imaging depth in ultrasound.
    • Implementing CE in array imaging is computationally intensive due to per-element pulse compression.

    Purpose of the Study:

    • To present an efficient method for implementing coded excitation (CE) pulse compression in array ultrasound imaging.
    • To reduce the computational complexity associated with CE in beamforming.
    • To maintain or improve image quality metrics, including axial and lateral resolution.

    Main Methods:

    • Developed an approach integrating pulse compression into the frequency domain beamforming process.

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  • Evaluated computational savings and image quality on a Verasonics imaging system.
  • Compared performance against traditional time-domain processing methods.

    • Main Results:

    • Achieved significant computational reductions, ranging from 4- to 33-fold, depending on lateral resolution.
    • Demonstrated no degradation in axial resolution.
    • Observed potential for up to 77-fold computational savings at higher sampling rates (10x central frequency).

    Conclusions:

    • The proposed frequency domain beamforming approach offers an efficient implementation of CE in array imaging.
    • This method makes CE a feasible technique for enhancing SNR, imaging depth, and frame rates.
    • Enables advanced imaging capabilities without substantial increases in computational load.