Monte-Carlo simulation of transit time dependence of Doppler spectra in dynamic time-resolved tomography

Time-resolved laser tomography is a promising technique for noninvasive laser examination of structure acid condition of biotissues. The results of Monte-Carlo simulations discussed in this paper are related with time-resolved laser Doppler tomography of blood transport. in the tissues. In this technique the temporal variations of the optical signal carry information about blood transport. By simulating laser light propagation in a human skin model an opportunity for in-depth scanning of skin is demonstrated. The sample volume is scanned in-depth by selecting the photons with short, medium and long transit times. As an example a possibility for detection of a small blood vessel embedded in dermis is considered.