Overview

The toolbar provides comprehensive controls for interacting with DICOM images in the viewer. This section covers all available toolbar functions and their usage.

Toolbar actions are split into two categories:

Discrete actions, which are applied instantly at the point of clicking
Continuous actions, which bind a mouse click (left click or right click) to that particular operation

Action types:

Continuous actions are applied at the viewport level where you can adjust:
- Windowing
- Pan
- Zoom
- Annotate/measure
Discrete actions either:
- Perform a transformation on a viewport:
  - →MPR
  - →3D
  - →Fusion
  - →Color inversion
  - →Rotation
  - →Reset view
- Adjust a viewer-wide state:
  - →Viewport layout
  - →Cross reference type
  - →Sync scroll enabled/disabled
  - →Signal intensity on hover enabled/disabled
  - →Clear viewports (removes all series)
- Study/series download

Ex. Mouse icons next to the window and pan buttons indicate active left and right click bindings.

Layout

Changes the viewport layout configuration, allowing you to arrange multiple viewports in different grid patterns (e.g., 1x1, 2x2, 3x3).

Discrete action: click applies state change to viewer-wide.

Window

Adjusts the window width and level (brightness and contrast) of the displayed image. Once activated, click and drag in a viewport to modify the windowing parameters.

Continuous action: click + drag changes state of the viewport.

Pan

Moves the image within the viewport. Once activated, click and drag in a viewport to pan the image.

Continuous action: click + drag changes state of the viewport.

Zoom

Magnifies or reduces the image display. Once activated, click and drag in a viewport to zoom in or out.

Continuous action: click + drag changes state of the viewport.

Annotate

Adds annotations and measurements to images. The annotation tool includes several types: line, arrow, angle, ROI (region of interest), spine, and text. Once activated, click and/or drag in a viewport to create annotations.

Continuous action: click + drag changes state of the viewport.

Line

Draw straight lines for length measurements.

Arrow

Draw arrows to point to specific areas of interest.

Angle

Measure angles between two lines.

ROI

Draw regions of interest for area measurements and statistical analysis - area, signal mean, signal standard deviation, and signal min/max. Allows you to select which ROI shape you would like to use.

Spine

Draw spine annotations for spinal measurements and alignment analysis. Allows you to configure if the annotation stays on one frame or propagates across all frames in a series, as well as defining the start and end vertebrae. The spine annotation tool automatically becomes unselected after completing the last vertebra for optimal user experience.

Text

Add text annotations to label areas or add notes.

Cross Reference

Sets the cross-reference type for linking viewports, enabling spatial relations/context between series in different viewports. You can configure the cross reference to show the center and slice boundaries, center only, boundaries only, or none.

Discrete action: click applies state change to viewer-wide.

Sync Scroll

Enables or disables synchronized scrolling across multiple viewports through image series that have aligned orientation and spatial overlap simultaneously and seamlessly.

Discrete action: click applies state change to viewer-wide.

Info Overlay

Toggles the display of relevant information overlays on viewports. When enabled, shows the series name + patient name in top right, frame scrollbar on right with frame count on bottom right, display parameters on the bottom left, and viewport actions on top left.

Discrete action: click applies state change to viewer-wide.

Signal Intensity

Enables or disables signal intensity display on hover, showing pixel intensity values when you move your cursor over the image. Renders in blue in bottom left on top of display parameters to allow users to inspect the signal value of the series at the cursor position.

Discrete action: click applies state change to viewer-wide.

Rotate View

Rotates the image orientation in 90-degree increments clockwise within the selected viewport.

Discrete action: click applies state change to viewport.

Invert Color

Inverts the color scheme of the image in the selected viewport, switching between positive and negative display modes.

Discrete action: click applies state change to viewport.

MPR

Activates multi-planar reconstruction mode, allowing you to view a series in a non-native acqusition plane. Supported planes are axial, coronal, and sagittal.

Discrete action: click applies state change to viewport.

3D Volume Rendering

Generates a 3D volume rendering, enabling interactive 3D visualization and manipulation. Annotations, signal intensity, and color inversion are not supported in 3D mode.

Discrete action: click applies state change to viewport.

Fusion

Enables fusion of multiple series in a single viewport, allowing you to overlay and blend different imaging modalities or series for comparative analysis.

Discrete action: click applies state change to viewport.

Reset View

Resets the selected viewport to its default zoom, pan, and windowing settings. Also resets the color inversion and clears all annotations.

Discrete action: click applies state change to viewport.

Clear Viewports

Removes all series and images from all viewports, clearing the viewer for loading new series.

Discrete action: click applies state change to viewer-wide.

Download Study

Downloads the current study or series as DICOM files to your local machine. The download popup allows users to select which series or studies they would like to include in their download.

Discrete action: click brings up configure study download menu.