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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Updated: Jul 16, 2025

Automated 3D Optical Coherence Tomography to Elucidate Biofilm Morphogenesis Over Large Spatial Scales
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Computational 3D microscopy with optical coherence refraction tomography.

Kevin C Zhou1, Ryan P McNabb2, Ruobing Qian1

  • 1Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.

Optica
|September 18, 2023
PubMed
Summary
This summary is machine-generated.

We developed 3D optical coherence refraction tomography (OCRT), a new computational imaging method. OCRT overcomes limitations of optical coherence tomography (OCT) to provide enhanced 3D microscopy with reduced noise and improved resolution.

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Area of Science:

  • Biomedical optics
  • Computational imaging
  • 3D microscopy

Background:

  • Optical coherence tomography (OCT) is a successful in vivo 3D imaging technique used in clinical diagnostics.
  • OCT's utility as a 3D microscopy tool is limited by speckle noise and poor lateral resolution at depth.
  • Existing OCT methods struggle to provide high-resolution, noise-free 3D reconstructions over large fields of view.

Purpose of the Study:

  • To introduce 3D optical coherence refraction tomography (OCRT) as a computational extension of OCT.
  • To develop a label-free computational 3D microscope that enhances resolution and reduces speckle noise.
  • To demonstrate OCRT's capability to visualize previously unobserved 3D features in biological samples.

Main Methods:

  • OCRT synthesizes an incoherent contrast mechanism by combining multiple OCT volumes acquired across two rotation axes.
  • A novel optical design with a parabolic mirror captures 5D plenoptic datasets.
  • The system achieves millimetric 3D fields of view with a wide angular range (±75°) without sample movement.

Main Results:

  • 3D OCRT produces resolution-enhanced, speckle-reduced, and refraction-corrected 3D reconstructions.
  • The method successfully visualizes 3D features in fruit fly, zebrafish, and mouse samples that are unobservable with conventional OCT.
  • The computational approach enables label-free 3D microscopy with significant improvements over standard OCT.

Conclusions:

  • 3D OCRT represents a significant advancement in 3D microscopy, overcoming key limitations of conventional OCT.
  • This computational imaging technique offers enhanced visualization capabilities for biological samples.
  • OCRT holds promise for future applications in biological research and potentially clinical diagnostics requiring high-resolution 3D imaging.