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Endoscopic diffraction phase microscopy.

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    We developed the first endoscopic diffraction phase microscopy (eDPM) system for high-resolution imaging. This novel eDPM system corrects for endoscope aberrations, improving image quality for potential in vivo studies.

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    Area of Science:

    • Biomedical Optics
    • Microscopy
    • Medical Imaging

    Background:

    • Quantitative phase imaging offers label-free, high-resolution visualization.
    • Endoscopic probes often introduce geometric aberrations, limiting image quality.
    • Current endoscopic imaging lacks single-cell-level phase information.

    Purpose of the Study:

    • To introduce the first endoscopic diffraction phase microscopy (eDPM) system.
    • To demonstrate aberration correction using phase information from eDPM.
    • To validate the system's potential for in vivo applications.

    Main Methods:

    • Development of a gradient-index-lens-based endoscope probe integrated with a diffraction phase microscopy (DPM) module.
    • Single-shot phase imaging at single-cell resolution.
    • Digital spectral phase filtering to correct for endoscope-induced geometric aberrations.

    Main Results:

    • Successful implementation of the first eDPM system.
    • Demonstration of significant reduction in geometric aberrations using digital spectral phase filtering.
    • Validation of the method with reflective semiconductor samples and blood cells, achieving improved resolution.

    Conclusions:

    • The developed eDPM system provides high-resolution, quantitative phase imaging capabilities.
    • Digital aberration correction significantly enhances image quality from endoscopic probes.
    • eDPM shows strong potential for future in vivo microscopic studies.