Data model: volumes, layers & tracts¶
BrainDeer organizes loaded data as layers. Each layer has its own display settings (colormap, contrast, opacity) and can be toggled individually.
| Layer type | Formats | Typical use |
|---|---|---|
| Volume (base) | .nii, .nii.gz |
Anatomy (T1, CT, …) |
| Volume (overlay) | .nii, .nii.gz |
Atlases, activations, VTA |
| Tractography | .trk, .trk.gz |
Fiber bundles in 3D |
| Surface/mesh | (export: glTF) | Cortical surfaces, electrodes |
Media for this page
- [ ] Diagram D2: layer stack (base → overlays → tracts) as a graphic
- [ ] Screenshot: file list with several layers
Large files¶
Very large volumes are loaded lazily through a volume proxy — details in Performance & large data.