Table 2.

Fitted optical properties of two-layer phantoms.

Depth (cm)	μa1 (cm−1)	${\mu }_{s1}^{\prime }\left({\mathrm{cm}}^{-1}\right)$	μa2 (cm−1)	${\mu }_{s2}^{\prime }\left({\mathrm{cm}}^{-1}\right)$
True value	0.023	8.25	0.08	6.5
1.0	0.019	7.28	0.074	9.4
1.3	0.022	9.79	0.10	6.6
1.5	0.023	7.5	0.098	19.45
2.0	0.024	8.25	0.088	10.25