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Updated: Jul 23, 2025

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Optical coherence tomography-based design for a real-time motion corrected scanning microscope.

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    This study introduces a motion tracking module for two-photon fluorescence microscopy, correcting distortions caused by sample movement. This innovation enhances imaging quality for dynamic biological studies.

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    Area of Science:

    • Biomedical Engineering
    • Optical Imaging
    • Microscopy

    Background:

    • Two-photon fluorescence microscopy is vital for studying live cell and tissue dynamics.
    • Sample motion during imaging introduces significant distortions, limiting data accuracy.
    • Existing methods may require contrast agents or complex setups.

    Purpose of the Study:

    • To develop a real-time motion tracking and correction module for laser scanning two-photon microscopes.
    • To integrate optical coherence tomography (OCT) for motion compensation without additional contrast agents.
    • To improve the fidelity of dynamic biological imaging in the presence of bulk motion.

    Main Methods:

    • Designed a spectral domain optical coherence tomography (SD-OCT) based motion tracking module.
    • Integrated the module with a laser scanning two-photon microscope using a single dichroic mirror.
    • Implemented real-time corrective feedback for lateral motion compensation.

    Main Results:

    • The system successfully tracked lateral displacements up to 10 μm at 5 Hz.
    • Achieved a feedback latency of under 14 ms for real-time correction.
    • Demonstrated integration without requiring additional contrast agents.

    Conclusions:

    • The developed motion tracking module effectively corrects motion artifacts in two-photon microscopy.
    • The system offers a non-invasive, adaptable solution for enhanced dynamic imaging.
    • Future work includes 3D correction and latency reduction for broader applicability.