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Related Experiment Video

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High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging
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Automatic motion compensation for structured illumination endomicroscopy using a flexible fiber bundle.

Andrew Thrapp1, Michael Hughes1

  • 1Univ. of Kent, United Kingdom.

Journal of Biomedical Optics
|February 27, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces motion compensation for structured illumination microscopy (SIM) endomicroscopy. This technique reduces artifacts, enabling clearer imaging and larger fields of view for in vivo clinical applications.

Keywords:
digital micromirror deviceendomicroscopymosaickingmotion compensationstructured illumination

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Area of Science:

  • Biomedical optics
  • Medical imaging technology
  • Microscopy techniques

Background:

  • Confocal microscopy offers optical sectioning in endomicroscopes, but simpler systems use widefield illumination.
  • Structured Illumination Microscopy (SIM) can add optical sectioning to widefield systems but suffers from motion artifacts.
  • Motion artifacts in SIM hinder in vivo use and prevent image mosaicking for a larger field of view (FOV).

Purpose of the Study:

  • To develop and validate an automatic motion compensation technique for SIM endomicroscopy.
  • To enable artifact-free mosaicking of SIM images acquired with a moving probe.
  • To improve the utility of SIM for in vivo clinical imaging.

Main Methods:

  • Implemented image registration and real-time pattern orientation correction using a digital micromirror device for motion compensation.
  • Quantified reconstruction accuracy by comparing moving probe results to stationary probe acquisitions using the mean of absolute differences (MAD).
  • Demonstrated mosaicking capabilities with a moving probe under both mechanical and freehand conditions.

Main Results:

  • Achieved significant reduction in motion artifacts, improving MAD from 0.85 to 0.13 (lens paper) and 0.27 to 0.12 (bovine tissue).
  • Successfully generated mosaics with substantially reduced artifacts, showcasing improved image quality.
  • Validated the motion compensation technique in both controlled mechanical and freehand experimental setups.

Conclusions:

  • Motion compensation effectively reduces artifacts in SIM endomicroscopy reconstructions.
  • The technique enables the creation of high-fidelity mosaics, expanding the effective FOV beyond the physical probe limits.
  • This advancement offers clinicians a more comprehensive view of tissue morphology for improved diagnosis.