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Related Experiment Videos

Visualizing early frog development with motion-sensitive 3-D optical coherence microscopy.

R C Haskell1, M E Williams, D C Petersen

  • 1Department of Physics, Harvey Mudd College, Claremont, CA, USA.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 3, 2007
PubMed
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This summary is machine-generated.

A novel 3-D optical coherence microscope (OCM) visualizes early animal and plant development. This motion-sensitive instrument captures mesendoderm migration during frog gastrulation, revealing tissue dynamics.

Area of Science:

  • Developmental Biology
  • Biomedical Imaging
  • Optical Engineering

Background:

  • Studying early embryonic development requires advanced imaging techniques to visualize dynamic cellular processes.
  • Existing methods may lack the resolution or depth penetration needed to observe critical developmental events in vivo.
  • Optical Coherence Microscopy (OCM) offers non-invasive, high-resolution imaging capabilities.

Purpose of the Study:

  • To design and construct a motion-sensitive, en-face-scanning 3-D optical coherence microscope (OCM) for studying early plant and animal development.
  • To demonstrate the OCM's capability by imaging key events during frog gastrulation.
  • To evaluate the OCM's imaging performance, including depth penetration and contrast mechanisms.

Main Methods:

Related Experiment Videos

  • Development of a motion-sensitive, en-face-scanning 3-D optical coherence microscope (OCM).
  • Acquisition of time-lapse OCM movies of frog gastrulation.
  • Analysis of fringe-amplitude and motion-sigma data to generate complementary images.
  • Assessment of imaging depth penetration at different wavelengths (850 nm and 1310 nm).

    • Main Results:

    • The OCM successfully visualized mesendoderm migration during frog gastrulation, forming inner tissue layers.
    • Motion-sigma data revealed Brownian motion in endoderm yolk cells, providing intrinsic contrast for tissue differentiation.
    • Depth penetration at 850 nm was adequate for ectoderm but limited for deeper structures; 1310 nm imaging showed improved penetration.
    • 2-D OCT images at 1310 nm demonstrated potential for studying cell movements near the blastocoel floor.

    Conclusions:

    • The developed motion-sensitive 3-D OCM is a valuable tool for studying dynamic processes in early embryonic development.
    • The combination of fringe-amplitude and motion-sigma data enhances contrast and provides insights into tissue-specific cellular behavior.
    • Optimizing imaging wavelength (e.g., 1310 nm) can improve depth penetration for comprehensive developmental studies.