Speckle-contrast monitoring of tissue thermal modification |
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Authors: | Zimnyakov Dmitry A Agafonov Dmitry N Sviridov Alexander P Omel'chenko Alexander I Kuznetsova Liana V Bagratashvili Victor N |
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Affiliation: | Department of Optics, Saratov State University, Russia. zimnykov@sgu.ssu.runnet.ru |
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Abstract: | Measurements of the contrast value of time-averaged speckle-modulated images of cartilage tissue are used to study tissue thermal modification in the case of laser-light treatment. This modification is related to thermally induced internal stress relaxation in the matrix of the treated tissue. The specific feature of the evolution of time-averaged speckle contrast with a change in the current temperature of modified collagen tissue is the typical looplike form of the contrast-temperature dependencies associated with irreversible changes in tissue structure and correlated with changes in the tissue diffuse transmittance and the tissue internal stress mentioned by other researchers. |
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