Datasets:
File size: 3,153 Bytes
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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.
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