ANALYSIS OF THE CONTRIBUTION OF DIFFERENT SCATTERING ORDERS TO THE OPTICAL COHERENCE TOMOGRAPHY SIGNAL FROM A BLOOD LAYER: A MONTE CARLO STUDY

摘要

A computer simulation by the Monte Carlo method of propagation of IR light in a layer of blood and the formation of the optical coherence tomograph signal are studied. The blood sample is modeled by a 0.5-mm flat layer of a suspension of nonaggregating light-scattering particles. Model dependences of the number of detected photons on the number of scattering acts involving these photons are studied for different particles concentrations. Finally, it is shown that the greatest contribution to the OCT signal from blood layers with hematocrits of 5 and 10% is made by low-order scattering, while multiple scattering contributes the most to a blood layer with a 35% hematocrit.