> ## 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.

# Label Reference

> Complete list of segmentation labels and their anatomical locations

## Vertebrae

| Label  | Region   | Description                   |
| ------ | -------- | ----------------------------- |
| C1–C7  | Cervical | Cervical vertebrae (neck)     |
| T1–T12 | Thoracic | Thoracic vertebrae (mid-back) |
| L1–L5  | Lumbar   | Lumbar vertebrae (lower back) |
| S1     | Sacral   | First sacral vertebra         |

## Intervertebral Discs

| Label         | Location            |
| ------------- | ------------------- |
| C2/3 – C6/7   | Cervical discs      |
| T1/2 – T11/12 | Thoracic discs      |
| T12/L1 – L4/5 | Thoracolumbar discs |
| L5/S1         | Lumbosacral disc    |

## Other Structures

| Label        | Description                                           |
| ------------ | ----------------------------------------------------- |
| Spinal Canal | Central canal containing spinal cord and cauda equina |

## Color Coding

Each label is assigned a unique color for easy identification in the 3D view. Colors are consistent across all views and export formats. See the full color reference in the [Label Table](/reference/label-table).