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Documentation Index

Fetch the complete documentation index at: https://docs.spine.altician.com/llms.txt

Use this file to discover all available pages before exploring further.

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How It Works

The AI model automatically segments spine structures from T2-weighted MRI scans. It segments:
  • Vertebrae — C1 through S1 (cervical, thoracic, lumbar, sacral)
  • Intervertebral Discs — C2/3 through L5/S1
  • Spinal Canal — The central canal containing the spinal cord
3D segmentation result

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How It Works

The model uses a two-phase approach based on nnU-Net:
  1. Semantic segmentation — Classifies each voxel into tissue types (vertebra, disc, canal, background)
  2. Instance segmentation — Separates individual vertebrae and discs (e.g., L1 vs L2)
The result is rendered as 3D meshes overlaid on the MRI volume.

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Requirements

  • Spine Helper must be installed and running (see Helper Setup)
  • T2-weighted MRI is optimal (the model is trained on T2W data)
Segmentation is optimized for T2-weighted sagittal spine MRI. Results on other contrasts may vary.