Table 2.
Sensitivity and Positive Predictive Value of Image Analysis of the Unstained Specimen and of Images Segmented by the Different Transforms and Algorithms
| Statistic⁎ | Unstained specimen | RVM2 DCA | RVM3 DCA | RVM2 β-NTF | RVM3 β-NTF | RVM2 HALS NMF | RVM3 HALS NMF | RVM2 NMU-ℓ1 | RVM3 NMU-ℓ1 |
|---|---|---|---|---|---|---|---|---|---|
| Nerve fiber (nervus ischiadicus) | |||||||||
| Sens, % | 100/100 | 92.6/92.7 | 92.9/96.2 | 90.6/90.6 | 96.4/98.2 | 90.9/90.7 | 98.2/96.4 | 92.3/92.5 | 98.3/98.3 |
| PPV, % | 67/67 | 82/82.3 | 63.4/61.4 | 70.6/71.6 | 55.8/57.9 | 71.4/69 | 73/74 | 64/66.2 | 66.7/65.9 |
| Spleen tissue | |||||||||
| Sens, % | 97.7/97.7 | 97.7/94.9 | 97.7/96 | 97.7/95.6 | Failed | 96.2/96.3 | Failed | 96.2/94.2 | 98.3/99.2 |
| PPV, % | 70/73.6 | 75.7/73.2 | 84/84 | 84.2/79.9 | Failed | 80.5/84 | Failed | 81.5/78.9 | 87.4/86 |
Results obtained independently by two pathologists are separated by a virgule mark. Bold type indicates the several best results that combine high sensitivity and low false positive alarm rate.
⁎
Sens = NTP/(NTP + NFN) and PPV = NTP/(NTP + NFP), where Sens is sensitivity, N is number, TP is true positive, FN is false negative, FP is false positive, and PPV is positive predictive value.