Fig. 2.

Search boxes for three trials with simulated data. The bounds of the search box relative to the exact answer are shown: (a) upper bound for μ_t, (b) upper bound for η_a, (c) lower bound for μ_t, and (d) lower bound for η_a. The blue, green, and red curves correspond to simulated data created with 2 · 10⁵, 2 · 10⁶, and 2 · 10⁷, photons respectively, as indicated by the vertical arrows. The value N_phot corresponds to the number of photons used in each of 12 iterations, starting from 2 · 10⁴ and doubling 11 times to 4.096 · 10⁷. The simulation used the parameters ${\mu }_s^{(0)}=3{\text{ mm}}^{-1}$ and ${\mu }_a^{(0)}=0.01{\text{ mm}}^{-1}$ corresponding to ${\mu }_t^{(0)}=3.01{\text{ mm}}^{-1}$ and ${\eta }_a^{(0)}=0.003322{\text{ mm}}^{-1}$, thickness t = 4.76 mm, index of refraction n = 1.487, and asymmetry parameter g = 0.621.