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Doppler optical coherence imaging of converging flow.
Sergey G Proskurin1, Yonghong He, Ruikang K Wang
1Biophotonics Laboratory, Institute of BioScience and Technology, Cranfield University, Silsoe, Bedfordshire MK45 4DT, UK.
Physics in Medicine and Biology
|May 7, 2004
Summary
Doppler optical coherence tomography non-invasively maps fluid flow in complex geometries. This technique visualizes detailed velocity profiles, showing potential for blood circulation studies.
Area of Science:
- Biomedical Engineering
- Optical Imaging
- Fluid Dynamics
Background:
- Accurate fluid flow mapping is crucial in various scientific fields.
- Complex geometries present challenges for traditional flow measurement techniques.
- Optical Coherence Tomography (OCT) offers high-resolution imaging capabilities.
Purpose of the Study:
- To demonstrate the application of Doppler optical coherence tomography (DOCT) for 2D flow mapping.
- To visualize velocity profiles in highly scattering fluids within complex geometries.
- To assess the potential of DOCT for studying phenomena like blood circulation.
Main Methods:
- Experimental application of Doppler optical coherence tomography.
- Utilizing converging flow (die entry) to simulate complex geometry.
- Acquiring structural and velocity images with high spatial resolution (approx. 10 x 10 x 10 microm3).
Main Results:
- Successful non-invasive 2D flow mapping of highly scattering fluid.
- Demonstration of varying velocity profiles before and after flow entry.
- Observation of diverse profile shapes including concave, blunted, parabolic, and triangular.
Conclusions:
- Doppler optical coherence tomography is effective for mapping fluid flow in complex geometries.
- The technique provides detailed insights into velocity profile variations.
- DOCT shows promise for applications in biomedical research, particularly in blood circulation studies.