Biomedical subjects
Publications and source records attributed to Sergey Ulyanov.
Limits of applicability of classical diffusing wave spectroscopy (DWS) are essentially extended. DWS is adapted to the case of small number of scattering events. An explicit formula for correlation function of intensity fluctuations of scattered light is derived. Potentials of DWS for diagnostics of random microflow are demonstrated.
Modeling of skin burns has been performed in this study. Autocorrelation functions of intensity fluctuations of scattered light were measured for two-layered turbid media. The first layer served as a model for motionless scatterers (optically inhomogeneous gel film) whereas the second one simulated dynamic light scattering (Brownian motion of intralipid particles in aqueous suspension). This medium was used as a model of skin burns. A theory related quasi-elastic light scattering measurements to cutaneous blood flow was used. The dependencies of statistical properties of Doppler signal on the properties of burned skin as well as on the velocity of cutaneous blood flow have been investigated. Theoretical predictions have been verified by measurements both of dynamic and stationary light scattering in model media.