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Single-shot two-dimensional spectroscopic magnetomotive optical coherence elastography with graphics processing unit

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    This study introduces faster magnetomotive optical coherence elastography (MM-OCE) for in vivo tissue biomechanics. The enhanced speed enables the first-ever real-time MM-OCE imaging in living mouse skin.

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    Area of Science:

    • Biomedical Optics
    • Medical Imaging
    • Biophysics

    Background:

    • Biomechanical contrast in tissues is crucial for disease diagnosis.
    • Spectroscopic magnetomotive optical coherence elastography (MM-OCE) assesses tissue properties.
    • Previous MM-OCE methods were limited by slow imaging speeds, preventing in vivo applications.

    Purpose of the Study:

    • To significantly accelerate MM-OCE data acquisition and processing.
    • To enable in vivo MM-OCE imaging for the first time.
    • To validate the enhanced system's performance on phantoms and in living subjects.

    Main Methods:

    • Implemented a single chirped force excitation before BM-scan magnetomotion imaging.
    • Utilized graphics processing unit (GPU) parallel computing for accelerated elastogram reconstruction.
    • Developed an accelerated MM-OCE platform for rapid data acquisition and post-processing.

    Main Results:

    • Achieved MM-OCE data acquisition in 2.9 seconds and post-processing in 0.6 seconds for a 2048-frame stack.
    • Demonstrated high spatial resolution elasticity sensing on tissue-mimicking phantoms.
    • Successfully acquired the first in vivo MM-OCE images from living mouse skin.

    Conclusions:

    • The accelerated MM-OCE platform overcomes previous speed limitations for in vivo imaging.
    • This breakthrough enables real-time biomechanical assessment of tissues in living organisms.
    • MM-OCE is now a feasible technique for in vivo applications, paving the way for new diagnostic tools.