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Journal of Biomedical Optics

Characterization of blood flow rate in dental pulp by speckle patterns of backscattered light from an in vivo tooth
Author(s): Sergey K. Dick; Galina G. Chistyakova; Alex S. Terekh; Alexander Smirnov; Mehrnush M. Salimi Zadeh; Vladimir V. Barun
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Paper Abstract

Experimental data on the hemodynamics of dental pulp at different stages of caries treatment are given. Observations of speckle patterns in backscattered laser light are used as a measurement method to qualitatively characterize changes in blood flow rate through the dental pulp. The measurements were made by the author-designed experimental setup. Theoretical estimations showed that stationary reflected light from an <italic<in vivo</italic< tooth contains a negligibly small information body on changes in the pulpal blood flow due to the shadowing of the pulp by optically thick enamel and dentin. Therefore, the temporal variations in the speckle patterns are the only possible way that can provide monitoring of blood conditions in the pulp by using backscattered light. Various statistical characteristics of the random reflected light fields are studied as indicators of blood flow rate changes. There were selected five statistical parameters of backscattered speckle images that give self-consistent data on these changes. The parameters include four combinations of integrals of the Fourier transforms of the observed temporal variations as well as the speckle image contrast. The selected parameters are shown to qualitatively agree with general considerations on the effects of reduced or increased blood flow rates on the selected integral quantities.

Paper Details

Date Published: 23 October 2014
PDF: 8 pages
J. Biomed. Opt. 19(10) 106012 doi: 10.1117/1.JBO.19.10.106012
Published in: Journal of Biomedical Optics Volume 19, Issue 10
Show Author Affiliations
Sergey K. Dick, Belarusian State Univ. of Informatics and Radioelectronics (Belarus)
Galina G. Chistyakova, Belarussian State Medical Univ. (Belarus)
Alex S. Terekh, Belarusian State Univ. of Informatics and Radioelectronics (Belarus)
Alexander Smirnov, Belarusian State Univ. of Informatics and Radioelectronics (Belarus)
Mehrnush M. Salimi Zadeh, Belarusian State Univ. of Informatics and Radioelectronics (Belarus)
Vladimir V. Barun, B.I. Stepanov Institute of Physics (Belarus)

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