Real-time in vivo color Doppler optical coherence tomography.
Color Doppler optical coherence tomography (CDOCT) is a functional extension of optical coherence tomography (OCT) that can image flow in turbid media. We have developed a CDOCT system capable of imaging flow in real time. Doppler processing of the analog signal is accomplished in hardware in the time domain using a novel autocorrelation technique. This Doppler processing method is compatible with a high speed OCT system capable of imaging in real time. Using this system, we demonstrate cross-sectional imaging of bidirectional flow with CDOCT at four frames per second in a tissue-simulating phantom consisting of intralipid solution flowing in glass capillaries. As a demonstration of real-time imaging of blood flow in vivo we imaged pulsatible blood flow in a rat femoral artery at eight frames per second. Issues of velocity sensitivity, imaging speed, and range of velocity measurement are discussed, as well as potential applications of real-time CDOCT.
Duke Scholars
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Related Subject Headings
- Ultrasonography, Doppler, Color
- Tomography
- Time Factors
- Rheology
- Rats
- Phantoms, Imaging
- Optics and Photonics
- Optics
- Models, Theoretical
- Femoral Artery
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Ultrasonography, Doppler, Color
- Tomography
- Time Factors
- Rheology
- Rats
- Phantoms, Imaging
- Optics and Photonics
- Optics
- Models, Theoretical
- Femoral Artery