Absorptive effects on a parameter used to characterize the region of tissue visited by photons in continuous wave measurements

摘要

It has been shown that many aspects of photon trajectories in tissue are well described by a lattice random walk model. We take advantage of this to characterize the region interrogated by photons in experiments designed to estimate internal optical parameters from light intensity re-emitted on the interface between tissue and the exterior in continuous-wave measurements. The parameter chosen to characterize the investigated region is the expected number of distinct sites visited by a photon that survives to reach the surface at a specific point.