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(a) Diffusion theory calculations of Rt versus α′ (solid line) compared with Monte Carlo simulation for μ′s = 15, 20, and 25 cm−1 (symbols ◊, Δ, □, respectively), while varying μa from 0.1 to 60 cm−1; and (b) diffusion theory and Monte Carlo calculations for 1∕(1-Rt).
