Table 4. Summary of average extracted errors of parameters for various tissue types for the top 3 optimized solutions.
| Constraints | [THb] | [βc] | <µs’> | |||||||
| # of λ, increment | Tissue | Set1 | Set2 | Set3 | Set1 | Set2 | Set3 | Set1 | Set2 | Set3 |
| 12λ: 450∶1∶600 | A | 3.1 | 2.4 | 4.5 | −3.9 | −5.5 | −10.8 | 9.3 | 3.0 | 7.8 |
| FG | 3.9 | 3.4 | 5.6 | −13.9 | −15.9 | −15.7 | 4.2 | 3.9 | 11.8 | |
| M | 3.0 | 3.9 | −4.8 | 2.1 | −2.5 | −11.9 | 8.9 | 2.1 | 5.3 | |
| 12λ: 450∶5∶600 | A | 3.8 | 2.0 | 5.6 | −7.9 | −4.6 | −2.4 | 6.4 | 11.7 | 2.7 |
| FG | 2.0 | 8.8 | 12.2 | −7.6 | −10.1 | −11.4 | 11.2 | 4.9 | 10.0 | |
| M | −2.8 | 6.0 | 5.9 | −2.7 | −5.2 | −7.0 | 2.7 | 6.2 | 7.7 | |
| 12λ: 450∶10∶600 | A | 4.0 | −2.2 | 6.0 | −2.8 | −8.7 | −11.5 | 1.4 | 3.8 | 9.3 |
| FG | 7.7 | 9.7 | 10.4 | −9.6 | −17.3 | −14.9 | 3.2 | 10.8 | 15.7 | |
| M | 6.6 | −6.5 | 4.7 | −4.4 | −8.5 | −9.5 | 2.0 | −4.0 | 7.7 | |
| 8λ: 450∶1∶600 | A | 8.5 | 5.5 | 11.0 | −3.0 | −1.4 | −5.7 | 6.6 | 8.8 | 7.9 |
| FG | −2.6 | 10.4 | 8.7 | −7.0 | −18.9 | −12.0 | 6.6 | 13.5 | 11.1 | |
| M | 4.1 | −8.2 | 11.9 | 4.4 | −3.0 | 3.2 | 8.5 | 5.0 | 7.7 | |
| 8λ: 450∶5∶600 | A | 7.1 | 7.0 | 8.2 | −2.9 | −4.7 | −6.1 | 8.6 | 9.0 | 8.9 |
| FG | 5.9 | 8.5 | 11.9 | −6.8 | −18.2 | −10.0 | 13.3 | 14.6 | 15.5 | |
| M | 5.3 | 7.7 | 8.2 | 2.9 | −7.7 | 2.1 | 7.1 | 8.7 | 8.7 | |
| 8λ: 450∶10∶600 | A | 11.7 | 6.7 | 13.9 | −12.2 | −4.8 | −13.2 | 4.8 | 2.2 | 9.1 |
| FG | 13.9 | 7.2 | 7.1 | −15.4 | −8.8 | −10.0 | 9.0 | 4.5 | 14.8 | |
| M | −11.8 | 7.5 | 12.9 | −19.2 | −2.9 | −9.4 | 1.1 | 2.8 | 8.1 | |
| 5λ: 450∶1∶600 | A | 22.2 | 23.3 | 21.0 | −20.8 | −10.2 | 10.1 | 17.2 | 16.6 | 15.6 |
| FG | 23.3 | 28.4 | 27.0 | 10.9 | −18.1 | 12.5 | 22.8 | 23.5 | 23.2 | |
| M | 21.0 | 25.3 | 25.9 | 13.6 | 11.8 | 13.8 | 16.8 | 18.2 | 18.3 | |
| 5λ: 450∶5∶600 | A | 22.3 | 26.4 | 23.4 | 23.7 | −23.2 | 24.0 | 18.4 | 18.7 | 18.2 |
| FG | 27.1 | 29.3 | 20.9 | 28.1 | −20.6 | 28.0 | 25.1 | 23.5 | 24.4 | |
| M | 23.4 | 26.6 | 22.8 | 18.8 | −21.2 | 18.7 | 19.6 | 25.4 | 18.3 | |
| 5λ: 450∶10∶600 | A | 16.0 | 21.4 | 24.4 | 26.9 | 28.8 | 25.1 | 24.7 | 24.9 | 21.9 |
| FG | 13.3 | 21.8 | 17.9 | 22.5 | 23.8 | 28.1 | 29.6 | 29.8 | 29.0 | |
| M | 19.7 | 15.6 | −20.3 | 25.1 | 23.4 | −21.5 | 20.9 | 22.0 | −21.1 | |
| ES8λ: 400–600 | A | 22.5 | 14.0 | −15.5 | ||||||
| FG | 23.6 | 64.4 | −18.3 | |||||||
| M | 17.3 | 15.7 | −26.3 | |||||||
Positive values indicate an over-estimation of the extracted parameters while negative values indicate an under-estimation of the parameters. [THb]: total hemoglobin; [βc]: β-carotene; <µs’>: reduced scattering coefficient; A: adipose tissue; FG: fibroglandular; M: malignant tissue; ES8λ: semi-evenly spaced 8 wavelengths (400, 420, 440, 470, 500, 530, 570, 600 nm).