Thermal processes during the interaction of optical radiation pulses with heterogeneous laminated biotissues

Abstract

Energy absorption, heat transfer and thennochemical processes occurring during the interaction of optical radiation pulses with pigmented spherical and spheroidal granules in heterogeneous laminated biotissues are investigated theoretically. A system of equations is formulated which describes interaction processes for short radiation pulses of length t p < 10 −6 s and for long radiation pulses of length t p > 10 −6 s. Numerical solutions of this system give the space-time temperature distributions, degrees of thermochemical transformations of the biotissue molecules around the pigmented granules and in the volume of laminated biotissues. The possibility for selective interaction between short radiation pulses and pigmented biotissues is shown which results in the formation of thermodenaturation microregions inside and near the pigmented granules.