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 |