SC GM, WM, and TSC accuracy of automatic and semiautomatic segmentations against the manual reference standard segmentationsa
| Parameter | GM | WM | TSC | |
|---|---|---|---|---|
| AM (on 88% of acquired slices, nondiscarded from initial analysis) | DSC | 0.86 ± 0.04 (0.87) | 0.90 ± 0.03 (0.91) | 0.95 ± 0.03 (0.95) |
| HD (mm) | 0.90 ± 0.44 (0.72) | 0.82 ± 0.22 (0.75) | 0.64 ± 0.27 (0.67) | |
| SAM (on 12% of acquired slices, discarded from initial analysis) | DSC | 0.83 ± 0.04 (0.84) | 0.96 ± 0.01 (0.96) | |
| HD (mm) | 1.11 ± 0.55 (0.93) | 0.64 ± 0.15 (0.67) | ||
| AM (on nondiscarded samples) and SAM (on discarded slices), mixed (100% of acquired slices) | DSC | 0.86 ± 0.04 (0.86) | 0.91 ± 0.04 (0.92) | 0.96 ± 0.03 (0.96) |
| HD (mm) | 0.91 ± 0.46 (0.81) | 0.80 ± 0.22 (0.75) | 0.60 ± 0.29 (0.55) |
Note:—SAM indicates semiautomatic segmentation; TSC, total spinal cord; AM, automatic segmentations; DSC, Dice coefficient; HD, Hausdorff distances.
↵a All values are shown as mean ± SD (median).