Use of speckled speckles and low-coherent speckles in the imaging of biofluid flow velocity

Sergey S. Ulyanov; Valery V. Tuchin

doi:10.1117/12.306063

24 April 1998 Use of speckled speckles and low-coherent speckles in the imaging of biofluid flow velocity

Sergey S. Ulyanov, Valery V. Tuchin

Proceedings Volume 3251, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications II; (1998) https://doi.org/10.1117/12.306063
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

Formulas relating to diffraction of focused Gaussian beam from narrow blood microvessel have been derived. Vessel has been considered as a set of moving random screens. The correlation function of intensity fluctuations of statistically inhomogeneous speckled speckles has been studied with regard to flow measurement. Dependencies of statistical characteristics of biospeckles with a small number of scatterers on the number of scattering screens and on the length of coherence of incident light have been analyzed. It has been shown that the value of Doppler bandwidth in the scattered light essentially depends on the spatial velocity distribution in the blood flow.

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Sergey S. Ulyanov and Valery V. Tuchin "Use of speckled speckles and low-coherent speckles in the imaging of biofluid flow velocity", Proc. SPIE 3251, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications II, (24 April 1998); https://doi.org/10.1117/12.306063

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KEYWORDS

Scattering

Light scattering

Laser scattering

Correlation function

Doppler effect

Gaussian beams

Diffraction

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