Table 7 The Dice metric and contour distance metrics between automated segmentation and manual segmentation for long-axis images, as well between segmentations by different human observers
From: Automated cardiovascular magnetic resonance image analysis with fully convolutional networks
(a) Dice metric | Â | Â | Â | Â |
| Â | Auto vs Manual | O1 vs O2 | O2 vs O3 | O3 vs O1 |
| Â | (n = 600) | (n = 50) | (n = 50) | (n = 50) |
LA cavity (2Ch) | 0.93 (0.05) | 0.92 (0.02) | 0.90 (0.04) | 0.90 (0.04) |
LA cavity (4Ch) | 0.95 (0.02) | 0.95 (0.03) | 0.94 (0.02) | 0.94 (0.03) |
RA cavity (4Ch) | 0.96 (0.02) | 0.95 (0.02) | 0.95 (0.02) | 0.95 (0.02) |
(b) Mean contour distance (mm) | Â | Â | Â | Â |
LA cavity (2Ch) | 1.46 (1.06) | 1.57 (0.39) | 1.94 (0.68) | 1.95 (0.57) |
LA cavity (4Ch) | 1.04 (0.38) | 1.08 (0.40) | 1.21 (0.33) | 1.23 (0.35) |
RA cavity (4Ch) | 0.99 (0.43) | 1.13 (0.35) | 1.22 (0.37) | 1.16 (0.37) |
(c) Hausdorff distance (mm) | Â | Â | Â | Â |
LA cavity (2Ch) | 5.76 (5.85) | 5.66 (1.97) | 7.16 (3.12) | 6.78 (2.53) |
LA cavity (4Ch) | 4.03 (2.26) | 3.89 (1.85) | 4.29 (1.97) | 4.06 (1.44) |
RA cavity (4Ch) | 3.89 (2.39) | 4.31 (2.20) | 4.20 (2.16) | 4.08 (2.06) |