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| VALIDATION REPORT - Algorithmic lung segmentation |
| Master 2 Memoir - Digital Lung Twins |
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| Method : HU threshold (-400 HU) + morphology + flood-fill |
| Dataset : Yousra0x0/validation_20 |
| Patients : 20 |
| Valid : 20 |
| Failing : 8 (Dice < 0.95) |
| Date : 2026-05-05 12:43 |
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| HYPERPARAMETERS |
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| HU_THRESHOLD = -400 |
| DISK_CLOSING_RADIUS = 3 |
| DISK_CLOSING_TOUCHING = 5 |
| SEAM_HEAL_RADIUS = 2 |
| MIN_BLOB_VOXELS = 50 |
| MAX_LUNG_REGIONS = 3 |
| CLOSING_RADIUS = 3 |
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| GLOBAL METRICS |
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| dice : mean=0.9501 std=0.0317 min=0.8794 max=0.9833 CI95=[0.9358, 0.9644] n=20 |
| iou : mean=0.9067 std=0.0564 min=0.7847 max=0.9672 CI95=[0.8813, 0.9320] n=20 |
| f1 : mean=0.9501 std=0.0317 min=0.8794 max=0.9833 CI95=[0.9358, 0.9644] n=20 |
| precision : mean=0.9695 std=0.0061 min=0.9493 max=0.9787 CI95=[0.9667, 0.9722] n=20 |
| recall : mean=0.9332 std=0.0573 min=0.8056 max=0.9937 CI95=[0.9074, 0.9589] n=20 |
| sensitivity : mean=0.9332 std=0.0573 min=0.8056 max=0.9937 CI95=[0.9074, 0.9589] n=20 |
| specificity : mean=0.9966 std=0.0012 min=0.9941 max=0.9981 CI95=[0.9961, 0.9971] n=20 |
| hd95 : mean=9.5158 std=5.3898 min=2.0000 max=20.4939 CI95=[7.0923, 11.9393] n=20 |
| vol_error : mean=0.0491 std=0.0474 min=0.0011 max=0.1678 CI95=[0.0278, 0.0704] n=20 |
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| FAILURE CASE REPORT |
| Total failing cases: 9 |
| Dice threshold: 0.95 |
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| radiopaedia_40_86625_0 Dice=0.8794 HD95=14.0 VolErr=0.1678 |
| radiopaedia_7_85703_0 Dice=0.8980 HD95=12.8 VolErr=0.1024 |
| radiopaedia_4_85506_1 Dice=0.9032 HD95=8.0 VolErr=0.1222 |
| coronacases_003 Dice=0.9090 HD95=20.5 VolErr=0.1133 |
| radiopaedia_29_86490_1 Dice=0.9250 HD95=4.9 VolErr=0.0914 |
| radiopaedia_10_85902_1 Dice=0.9320 HD95=4.5 VolErr=0.0706 |
| radiopaedia_27_86410_0 Dice=0.9350 HD95=9.1 VolErr=0.0704 |
| radiopaedia_14_85914_0 Dice=0.9422 HD95=17.3 VolErr=0.0663 |
| coronacases_010 Dice=0.9499 HD95=16.0 VolErr=0.0369 |
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