Merged masks: TL precedence on overlap, matching the authors' converter

README.md

@@ -13,58 +13,6 @@ tags:
 pretty_name: Aortic Dissection (Graz) - true/false lumen CTA
 size_categories:
 - n<1K
-configs:
-- config_name: preview
-  data_files:
-  - split: train
-    path: preview/train-*
-dataset_info:
-  config_name: preview
-  features:
-  - name: case_id
-    dtype: string
-  - name: case_num
-    dtype: int32
-  - name: image
-    dtype: image
-  - name: mask
-    dtype: image
-  - name: overlay
-    dtype: image
-  - name: slice_index
-    dtype: int32
-  - name: slice_axis
-    dtype: int32
-  - name: n_slices
-    dtype: int32
-  - name: shape
-    dtype: string
-  - name: spacing_mm
-    dtype: string
-  - name: tl_voxels
-    dtype: int64
-  - name: fl_voxels
-    dtype: int64
-  - name: tl_volume_ml
-    dtype: float32
-  - name: fl_volume_ml
-    dtype: float32
-  - name: tl_fl_overlap_voxels
-    dtype: int64
-  - name: fl_label_value_raw
-    dtype: int32
-  - name: resampled_to_image_grid
-    dtype: bool
-  - name: annotator_tier
-    dtype: string
-  - name: split
-    dtype: string
-  splits:
-  - name: train
-    num_bytes: 6838450
-    num_examples: 40
-  download_size: 6853856
-  dataset_size: 6838450
 ---
 
 # Aortic Dissection (Graz) - CTA with true / false lumen expert annotations
@@ -136,10 +84,15 @@ masks ship under `original_masks/`.
    **409 HU (TL) / 339 HU (FL)**, i.e. contrast-filled arterial lumen and in
    line with the other 39 cases. Flagged by `resampled_to_image_grid`.
    Every other case's masks already match their image exactly.
-3. **Merged `maskNN.nrrd` added**, painted TL first then FL, so **FL wins
-   ties**. Ties are negligible: 16 of 40 cases overlap by 1-106 voxels, at most
-   **0.028%** of the TL-or-FL union - flap-boundary jitter, not a nested
-   structure. The two binaries remain available if you prefer to fan out.
+3. **Merged `maskNN.nrrd` added**, painted FL first then TL, so the **true
+   lumen wins ties** - matching the authors' own converter
+   [`apepe91/AD_NRRD_TO_STL`](https://github.com/apepe91/AD_NRRD_TO_STL) (cited
+   in the paper's Code Availability), which subtracts a dilated true lumen from
+   the false lumen. Ties are negligible either way: 16 of 40 cases overlap by
+   1-106 voxels, at most **0.028%** of the TL-or-FL union - flap-boundary
+   jitter, not a nested structure. Because ties are resolved, the stored map is
+   strictly disjoint, so `mask == 1` / `mask == 2` are exact. The two source
+   binaries remain available if you prefer to fan out.
 
 Deliberately **not** changed: no reorientation, no resampling of the other 39
 cases, no intensity windowing, original filenames kept.

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