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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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3D endoscope system using DOE projector.

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    Summary
    This summary is machine-generated.

    This study introduces a novel 3D endoscopic system for precise tumor shape and size measurement. It overcomes previous limitations, enabling accurate in situ diagnosis and treatment planning for internal tissues.

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    Area of Science:

    • Medical Imaging
    • Biomedical Engineering
    • Optical Instrumentation

    Background:

    • Accurate 3D shape and size measurement of internal lesions is crucial for endoscopic diagnosis and treatment.
    • Previous 3D endoscopic systems suffered from off-focus blur, peripheral aberrations, and reconstruction instability due to tissue scattering.
    • Subsurface scattering in biological tissues significantly complicates accurate 3D reconstruction.

    Purpose of the Study:

    • To develop an improved 3D endoscopic system capable of accurate lesion measurement.
    • To overcome limitations of off-focus blur and subsurface scattering in endoscopic imaging.
    • To enhance in situ diagnosis and treatment of internal tissue abnormalities.

    Main Methods:

    • Developed a new micro pattern laser projector with a Diffractive Optical Element (DOE) to eliminate off-focus blur.
    • Proposed a novel line-based grid pattern with gap coding to mitigate subsurface scattering effects.
    • Integrated the projector into an endoscopic system for 3D reconstruction of tissue surfaces.

    Main Results:

    • The new system successfully reconstructed tissue shapes irrespective of depth variance.
    • The Diffractive Optical Element (DOE) effectively resolved off-focus blur issues.
    • The gap-coded grid pattern significantly countered subsurface scattering effects during reconstruction.
    • Experiments on ex vivo human tumor samples demonstrated high accuracy in shape and size characterization.

    Conclusions:

    • The developed 3D endoscopic system effectively addresses prior limitations in lesion measurement.
    • This technology enables more reliable in situ endoscopic diagnosis and treatment planning.
    • The novel projector and pattern design offer a significant advancement in endoscopic imaging for oncology.