fidoptAMOS CT/CT
Abdominal CT scans of two patients from two scanners, paired by us from AMOS 2022, with 15 organs labelled on both.
Read before comparing (4)
- Alignment. The scans keep their native voxels, with unrelated origins up to two metres apart. The moving image's header carries one translation from elastix mutual information inside each body, the best of several starts, no annotation used. A rigid fit turns the bodies 2.7 to 9.5 degrees on the test pairs, a difference of posture, so only the translation is kept.
- Baseline. With no registration the 10 test pairs start at a Dice of 0.18 (0.08 to 0.28), against 0.09 as delivered and 0.26 after a fit on the organ centres, and an HD95 of 44 mm (32 to 62). Where one scan covers chest, abdomen and pelvis and the other only the abdomen, organs can start centimetres apart (pair_0185_0186, Dice 0.10).
- Overlap. AMOS_CTCT_Seg's cases are these pairs' fixed images, each on the same side of the split.
- Outside numbers. None: the pairing is ours.
| Accuracy | Smoothness | Cost | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| # | Method | Dice | Change | HD95 mm | SDlogJ | Folds % | Time s | RAM GB | GPU GB | Images |
| 1 | DemonsCPUapp | 0.293 ±0.073 | +0.113 | 38.25 ±7.52 | 0.964 | 6.80 | 32 | 5.0 | ||
| No registration | 0.180 ±0.048 | 43.96 ±7.25 | 0.000 | 0.00 | ||||||
The order averages each method's ranks on Dice, HD95 mm, SDlogJ, so the first one is not always the best in every column. ± is the 95% interval of the mean over the 10 pairs. Two neighbours are tied when a paired Wilcoxon test on the shared pairs does not find the upper one better on Dice (5%): the places a method could hold are then shown under its own. The best value of each column is in colour. Click a row to see its images, a column title to sort by it. Time and memory measured on Laptop.
Dice: how much the organ contours overlap, 1 is perfect. HD95: distance between the contours' surfaces. SDlogJ: how irregular the deformation is, 0 is perfectly smooth. Folds: share of the image where the deformation folds over itself.
Pair by pair
Click a score to look at that result: the fixed image, and over it the moving image after registration, with the annotations. Underlined scores have their image; for the others you see the pair without the result. A green cell gained against no registration on that pair, a red one lost.
About the data
- Test pairs
- 10 test pairs drawn with seed 2026 among the 50 pairs outside development, and 10 development pairs.
- Truth
- contours by experts 15 organs, the dataset's annotations
- Licence
- CC BY 4.0
10 pairs for tuning, never tested
pair_0001_0004, pair_0005_0006, pair_0007_0009, pair_0197_0198, pair_0152_0153, pair_0054_0057, pair_0045_0047, pair_0142_0143, pair_0030_0033, pair_0103_0104