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Fiber optic-based laser interferometry array for three-dimensional ultrasound sensing.

Xiangdong Ma, Yiqi Cai, Bo Fu

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    This summary is machine-generated.

    This study introduces a novel fiber optic ultrasound sensing array for advanced medical imaging. The sensor offers high sensitivity, wide bandwidth, and accurate 3D spatial detection, overcoming limitations of existing technologies.

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    Area of Science:

    • Biomedical Engineering
    • Optical Sensing
    • Medical Imaging

    Background:

    • Ultrasound imaging is a vital noninvasive diagnostic tool.
    • Existing optical ultrasound sensors face limitations in wavelength/angle specificity or bandwidth/frame rates.
    • A need exists for advanced optical ultrasound arrays with improved performance.

    Purpose of the Study:

    • To develop and demonstrate a fiber optic-based ultrasound sensing array.
    • To achieve high sensitivity, wide bandwidth, and 3D sensing capabilities.
    • To overcome limitations of current optical ultrasound sensing technologies for medical applications.

    Main Methods:

    • Experimental demonstration of a fiber optic ultrasound sensor array.
    • Characterization of sensor performance including noise equivalent pressure, nonlinearity, angular uniformity, and bandwidth.
    • Evaluation of 3D sensing accuracy in spherical coordinates.

    Main Results:

    • Achieved a noise equivalent pressure of 165 Pa and pressure nonlinearity below 5%.
    • Demonstrated -3dB angular uniformity of ±71° and a -6dB bandwidth from 0 to 27.2 MHz.
    • Attained high accuracy in 3D spatial sensing with radial distance errors within 5% and angular errors within 4° (polar) and 2° (azimuthal).

    Conclusions:

    • The developed fiber optic ultrasound sensing array exhibits high performance and viability.
    • This technology offers significant potential for advanced 3D ultrasound medical imaging.
    • The array overcomes previous limitations, paving the way for improved diagnostic capabilities.