Table 1. Differentiation with various component combinations in the SVM model.

Combination	Channel pairs HbO2 Correlation	Channels for HbO2 power	Channels for Hb power	Sensitivity (%)	Specificity (%)	PPV (%)
1	(3, 17) (11,24) (10,20) (8,22) (9,21)	All channels	All channels except for 12 and 20	75.2	83.2	78.9
2	(3,17) (11,24)	6, 8	6, 8	79.4	94.6	86.3
3	(3,17) (11,24)	3, 11, 17, 24	3, 11, 17, 24	70.8	87.7	78.5
4	(3, 17)	6	6	81.6	94.6	87.5
5	(3, 17)	8	8	66.2	93.3	78.6
6	(11,24)	6	6	73.7	98.3	84.9
7	(11,24)	8	8	66.8	93.6	79.1
8	(3, 17)	3, 17	3, 17	72.2	88.0	79.4
9	(3, 17)	6, 19	6, 19	79.2	95.3	86.6
10	(11,24)	11, 24	11, 24	52.2	89.4	69.2