Monte Carlo modeling of optical coherence tomography systems

A Monte Carlo model of light scattering in tissue is described and used to estimate the signal-to-noise-ratio that can be obtained with an optical coherence tomography (OCT) system. By utilizing the correspondence between the Wigner phase-space distribution and the specific intensity in the small-angle approximation, the novel Monte Carlo model is valid for light reflected both from and outside the focal plane of the system. The model is compared with experiments and an analytical model and good agreement is found. It is expected that the model can be used to examine how multiple scattering affects the axial resolution for a given source bandwidth.

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