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Updated: Jul 5, 2026
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Blood Flow Imaging with Ultrafast Doppler
Published on: October 14, 2020
High-speed wave-mixing laser Doppler imaging in vivo
1Laboratoire Kastler-Brossel de l'Ecole Normale Supérieure, CNRS UMR 8552, Université Pierre et Marie Curie - Paris 6, 24 rue Lhomond, 75231 Paris CEDEX 05, France. atlan@lkb.ens.fr
Optics Letters
|April 17, 2008
Summary
A new interferometric method allows high-speed, kilohertz-range optical spectroscopy for in vivo imaging. This technique enables detailed blood flow analysis in mice craniums under low light conditions using near-infrared lasers.
Area of Science:
- Biomedical Optics
- Spectroscopy
- Medical Imaging
Background:
- High-speed in vivo imaging requires advanced optical techniques.
- Laser Doppler imaging is sensitive to blood flow but can be limited by speed and light conditions.
- Parallel optical spectroscopy offers potential for enhanced spectral analysis.
Purpose of the Study:
- To report a novel interferometric method for parallel optical spectroscopy.
- To validate this method for high-speed laser Doppler imaging in vivo.
- To demonstrate its capability in low light conditions at kilohertz frame rates.
Main Methods:
- Development of an interferometric approach for parallel optical spectroscopy.
- Experimental validation using a complementary metal-oxide semiconductor camera at 2 kHz frame rate.
- In vivo imaging of mouse craniums with near-infrared laser light (785 nm) in reflection configuration.
- Sequential measurement of Doppler spectral images at varying optical frequency detunings.
Main Results:
- Successful demonstration of kilohertz-range parallel optical spectroscopy.
- High-speed in vivo imaging achieved under low light conditions.
- Acquisition of Doppler spectral images sensitive to blood flow in mice craniums.
- Effective shifting of spectral analysis range to the radio-frequency spectrum.
Conclusions:
- The reported interferometric method is effective for high-speed, parallel optical spectroscopy.
- This technique is suitable for low-light, in vivo laser Doppler imaging.
- It shows promise for sensitive blood flow monitoring in biomedical applications.
