Table 3.

Phantom optical properties at four spectral wavelengths for training and test sets.

Phantom	µa (mm−1)				${\mu }_s^{\prime }({\text{mm}}^{-1})$
	659 nm	691 nm	731 nm	851 nm	659 nm	691 nm	731 nm	851 nm
Training Set
1	0.037	0.034	0.030	0.016	0.90	0.84	0.80	0.67
2	0.038	0.033	0.029	0.014	0.71	0.66	0.64	0.55
3	0.035	0.031	0.026	0.012	1.9	1.8	1.7	1.6
4	0.071	0.062	0.054	0.027	1.1	1.1	1.0	0.96
5	0.0018	0.0019	0.0016	0.00058	1.2	1.1	1.0	0.88
6	0.040	0.037	0.032	0.017	1.4	1.3	1.3	1.1
7	0.11	0.093	0.083	0.044	0.90	0.85	0.81	0.68
8	0.012	0.010	0.0083	0.0036	0.98	0.92	0.88	0.76
Test Set
9	0.074	0.065	0.059	0.032	0.82	0.77	0.74	0.63
10	0.019	0.017	0.014	0.0066	0.90	0.87	0.84	0.78
11	0.068	0.060	0.053	0.027	1.6	1.5	1.4	1.3
12	0.019	0.016	0.014	0.0060	1.3	1.2	1.2	1.1
13	0.036	0.032	0.028	0.014	0.93	0.86	0.82	0.69
14	0.021	0.020	0.017	0.0091	0.79	0.74	0.71	0.60
15	0.0025	0.0026	0.0021	0.00071	1.7	1.7	1.6	1.4
16	0.0064	0.0078	0.0092	0.0019	0.93	0.94	0.93	0.96