The 2D Views
The 2D views display cross-sectional slices through volume data. Each view shows a different plane orientation.
Slice Orientations
Volvicon provides three orthogonal slice views:
| View | Plane | Also Known As | Description |
|---|---|---|---|
| Top | XY | Axial | Horizontal slices (looking from above) |
| Front | XZ | Coronal | Front-to-back slices (looking from front) |
| Right | YZ | Sagittal | Left-to-right slices (looking from side) |
Navigation Controls
Mouse Controls
| Action | Mouse | Description |
|---|---|---|
| Pan | Left-drag | Moves the view |
| Zoom | Right-drag | Zooms in (drag up) or out (drag down) |
| Zoom | Scroll wheel | Zooms in/out incrementally |
| Scroll Slices | Ctrl + Scroll | Moves through slices in the stack |
| Window/Level | Middle-drag | Adjusts brightness (horizontal) and contrast (vertical) |
Keyboard Shortcuts
| Shortcut | Action |
|---|---|
R | Reset view to fit data |
Page Up | Move to next slice |
Page Down | Move to previous slice |
Home | Go to first slice |
End | Go to last slice |
Slice Navigation
Slice Slider
Each 2D view has a slice slider that shows:
- Current slice number
- Total number of slices
- Slice position in physical coordinates
Drag the slider or click along it to navigate to a specific slice.
Crosshairs
Crosshairs link the three 2D views:
- The intersection point is synchronized across all views
- Click in one view to update the crosshair position in all views
- Use crosshairs to navigate to specific locations in 3D
Enable/disable crosshairs from the View ribbon tab.
Display Options
Window/Level (Brightness/Contrast)
Window and level control how intensity values are displayed:
| Term | Description |
|---|---|
| Window (Width) | Range of intensities displayed |
| Level (Center) | Midpoint of the displayed range |
Adjust by middle-dragging:
- Horizontal movement changes window (contrast)
- Vertical movement changes level (brightness)
Presets
Use preset window/level values for common visualization needs.
Interpolation
| Mode | Description |
|---|---|
| Nearest | No interpolation; shows actual voxel values |
| Linear | Smooth interpolation between voxels |
Overlays
The following can be overlaid on 2D views:
| Overlay | Description |
|---|---|
| Masks | Segmentation masks with configurable colors and opacity |
| Measurements | Distance, angle, and other measurements |
| Primitives | ROI shapes and geometric primitives |
| Annotations | Text labels and markers |
Mask Display Options
| Option | Description |
|---|---|
| Color | Set mask overlay color |
| Opacity | Adjust transparency (0-100%) |
| Outline | Show mask boundary only |
| Fill | Show filled mask region |
View Information
Each 2D view displays:
| Information | Location |
|---|---|
| Orientation labels | Corners of the view |
| Slice position | Bottom or top of view |
| Scale/zoom level | Corner of view |
| Intensity value at cursor | Status bar |
Context Menu
Right-click in a 2D view to access:
- Reset view
- Zoom options
- Window/level presets
- Show/hide overlays
- Screenshot capture
Synchronization
Views can be synchronized in several ways:
| Sync Option | Description |
|---|---|
| Position | Crosshair position linked across views |
| Zoom | Zoom level synchronized |
| Window/Level | Display settings synchronized |
Use the crosshair with Alt+mouse movement for dynamic exploration of anatomical structures across all three orthogonal planes simultaneously.
Related Topics
- The 3D View – 3D visualization
- Slice Views Tab – Slice view settings in the View ribbon
- Volume Grayscale Image – Understanding volume data
- Masks – Segmentation overlays