By Kirill Kulikov
This booklet covers the foundations of laser interplay with organic cells and tissues of various levels of association. the issues of biomedical diagnostics are thought of. Scattering of laser irradiation of blood cells is modeled for organic constructions (dermis, dermis, vascular plexus). An analytic conception is supplied that is according to fixing the wave equation for the electromagnetic box. It permits the exact research of interference results bobbing up from the partial superposition of scattered waves. handled issues of mathematical modeling are: optical characterization of organic tissue with large-scale and small-scale inhomogeneities within the layers, heating blood vessel less than laser irradiation incident at the outer floor of the surface and thermo-chemical denaturation of organic constructions on the instance of human skin.
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Extra info for Laser Interaction with Biological Material: Mathematical Modeling
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1 (Single scattering and transport theory, Moscow, 1981) 18. A. Duck, Physical Properties of Tissue. (Academic Press, San-Diego, 1990) 19. H. Niemz, Laser—Tissue Interactions: Fundamentals and Applications. (Springer, Berlin, 1996) 20. M. Star, Diffusion Theory of Light Transport, in ed. J. C. van Gemert Optical-Thermal Response of Laser-Irradiated Tissue, (Plenum, New York, 1995) pp. 131– 206 21. B. Fishkin, E. Gratton, Propagation of photon-density waves in strongly scattering media containing an absorbing semi-infinite plane bounded by a straight edge.
In each array the number of absorbed or scattered photons is recorded. Thus, the spatial resolution of the depth of the sample is 1 . L ave 20 2 Overview of Theoretical Approaches to the Analysis of Light Scattering If the photon is scattered, its new direction and coordinates are calculated with the following formulas: x = x0 + L sin θ cos ϕ, y = y0 + L sin θ sin ϕ, z = z 0 + L cos θ, where x0 , y0 , z 0 are the old coordinates of photon. If the photon is absorbed, then we start the next one. Next, all the coordinates are translated in the original coordinates.