Table 2.
Segmentation performance comparisons of the 6 nnU-Net models on small BMs (0.004–0.1 cm3, ESD 2–6 mm) of Testing Data Set 1
| Model | Overall sensitivity (all lesions) | HD95/Avg. HD | DSC |
|---|---|---|---|
| nnU-Net | 0.820 | 1.83 ± 3.41 (0.44 ± 0.99) |
0.591 ± 0.178 |
| nnU-Net with ADS | 0.807 | 1.32 ± 1.33 (0.30 ± 0.38) |
0.646 ± 0.149 |
| nnU-Net with ADS and 643 patch size | 0.807 | 1.56 ± 2.73 (0.37 ± 0.83) |
0.629 ± 0.172 |
| nnU-Net with ADS and batch size 5 | 0.829 | 1.66 ± 2.77 (0.39 ± 0.82) |
0.603 ± 0.170 |
| nnU-Net with ADL | 0.824 | 1.09 ± 0.48 (0.23 ± 0.15) |
0.707 ± 0.139 |
| nnU-Net with ADS and ADL | 0.814 | 1.10 ± 0.50 (0.23 ± 0.15) |
0.710 ± 0.141 |
Operating points were set at the same as all size brain metastases in Table 1.
Abbreviations: Avg HD = the average Hausdorff distance of detected true positive brain metastases in mm; DSC = Dice similarity coefficient of detected true positive brain metastases; HD95 = the 95 percentile Hausdorff distance of detected true positive brain metastases in mm; mean ± standard deviation; overall sensitivity = lesion-level sensitivity.