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Updated: Jun 22, 2026
10:46
Doppler Optical Coherence Tomography of Retinal Circulation
Published on: September 18, 2012
Mobility and transverse flow visualization using phase variance contrast with spectral domain optical coherence
Optics Express
|June 25, 2009
Summary
Phase variance-based motion contrast imaging using spectral domain optical coherence tomography visualizes microvasculature in zebrafish. This novel technique offers comparable statistics to Doppler flow imaging with only a slight increase in imaging time.
Area of Science:
- Biomedical Optics
- Medical Imaging
- Optical Coherence Tomography
Background:
- Optical Coherence Tomography (OCT) is a powerful imaging modality.
- Phase-based contrast methods enhance visualization of motion within OCT data.
- Existing methods may have limitations in speed or sensitivity for microvasculature imaging.
Purpose of the Study:
- To demonstrate phase variance-based motion contrast imaging.
- To evaluate its performance for visualizing microvasculature in vivo.
- To compare its speed and statistical quality against Doppler flow imaging.
Main Methods:
- Utilized two phase analysis methods within a spectral domain optical coherence tomography (SD-OCT) system.
- Developed phase variance contrast for mobility contrast visualization.
- Imaged in vivo zebrafish (3-4 days post-fertilization) and Intralipid solutions.
Main Results:
- Successfully demonstrated mobility contrast in static Intralipid solutions.
- Visualized vasculature oriented transversely to the imaging direction in zebrafish.
- Achieved comparable image statistics to Doppler flow imaging with only 25% longer acquisition times.
- Generated en face images from 3D data showing consistent vasculature.
Conclusions:
- Phase variance-based motion contrast is a viable technique for microvasculature imaging.
- This method provides enhanced contrast for subtle motion.
- It offers a promising alternative to Doppler flow imaging with improved or comparable performance.
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