Speckle-contrast monitoring of tissue thermal modification.
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.
Zimnyakov
Dmitry A
DA
Department of Optics, Saratov State University, Russia. zimnykov@sgu.ssu.runnet.ru
Agafonov
Dmitry N
DN
Sviridov
Alexander P
AP
Omel'chenko
Alexander I
AI
Kuznetsova
Liana V
LV
Bagratashvili
Victor N
VN
D000818:Animals; D002356:Cartilage / Q000502:physiology* / Q000528:radiation effects*; D006358:Hot Temperature; D066298:In Vitro Techniques; D007834:Lasers; D013552:Swine; D013696:Temperature; D013997:Time Factors