| --- |
| license: cc-by-4.0 |
| task_categories: |
| - image-segmentation |
| tags: |
| - medical |
| - mri |
| - lumbar-spine |
| - segmentation |
| - vertebrae |
| - intervertebral-disc |
| - spinal-canal |
| size_categories: |
| - n<1K |
| configs: |
| - config_name: default |
| data_files: |
| - split: training |
| path: data/training-* |
| - split: validation |
| path: data/validation-* |
| dataset_info: |
| features: |
| - name: patient_id |
| dtype: string |
| - name: sequence |
| dtype: string |
| - name: series |
| dtype: string |
| - name: subset |
| dtype: string |
| - name: num_vertebrae |
| dtype: int32 |
| - name: num_discs |
| dtype: int32 |
| - name: sex |
| dtype: string |
| - name: manufacturer |
| dtype: string |
| - name: model |
| dtype: string |
| - name: magnetic_field_strength |
| dtype: float32 |
| - name: num_slices |
| dtype: int32 |
| - name: shape_zyx |
| list: int32 |
| - name: num_label_classes |
| dtype: int32 |
| - name: image_middle_slice |
| dtype: image |
| - name: mask_middle_slice |
| dtype: image |
| - name: overlay_middle_slice |
| dtype: image |
| splits: |
| - name: training |
| num_bytes: 35627666 |
| num_examples: 360 |
| - name: validation |
| num_bytes: 10866295 |
| num_examples: 87 |
| download_size: 46479041 |
| dataset_size: 46493961 |
| --- |
| |
| # SPIDER — Lumbar Spine Segmentation in MR Images |
|
|
| Public release of the SPIDER dataset: 218 patients, 447 sagittal lumbar-spine MRI series with reference segmentations of vertebrae, intervertebral discs (IVDs), and spinal canal. Source: van der Graaf et al., *Scientific Data* 11:264 (2024). |
|
|
| ## Contents |
|
|
| | Path | Description | |
| |------|-------------| |
| | `images/images/` | 447 `.mha` MRI volumes — naming `{patient_id}_{t1|t2|t2_SPACE}.mha` (196 T1 + 210 T2 + 41 T2-SPACE) | |
| | `masks/masks/` | 447 `.mha` reference segmentations, one per image | |
| | `overview.csv` | Per-series metadata: subset (training/validation), sex, vendor, sequence parameters, etc. | |
| | `radiological_gradings.csv` | Per-IVD radiological gradings (Modic, Pfirrmann, herniation, etc.) | |
|
|
| ## Splits |
|
|
| Split assignment is in `overview.csv` column `subset`: |
|
|
| - **training** — 360 series |
| - **validation** — 87 series |
|
|
| (The Grand Challenge hidden test set of 39 patients is **not** included; it is only accessible via https://spider.grand-challenge.org/.) |
|
|
| ## Label Scheme (masks) |
|
|
| - Vertebrae: sequential integer labels (numbered top-down) |
| - IVDs: labeled by the vertebra immediately above (lowest IVD = 201, next up = 202, ...) |
| - Spinal canal: 100 |
| - Background: 0 |
|
|
| ## Recommended Ground Truth |
|
|
| Use `masks/masks/`. The 41 T2-SPACE series are the most authoritative tier (fully manual annotation on near-isotropic, higher-resolution voxels). T1/T2 masks were produced by iterative semi-automatic refinement under MSK-radiologist supervision. |
|
|
| ## Source |
|
|
| - **Paper**: van der Graaf, J. W., et al. (2024). Lumbar spine segmentation in MR images: a dataset and a public benchmark. *Sci Data* 11, 264. doi:10.1038/s41597-024-03090-w |
| - **Original Zenodo**: https://zenodo.org/records/10159290 |
| - **Grand Challenge**: https://spider.grand-challenge.org/ |
| - **License**: CC-BY 4.0 |
|
|
| This HuggingFace mirror reproduces the Zenodo v4 release (Nov 2023, modified Mar 2024) without modification. |
|
|
