Viewport
Viewport features and controls in the Avara Viewer.
Introduction
Section titled “Introduction”The viewport is the means through which readers interpret and interact with DICOM data. Users can:
- Apply discrete and continuous actions to the viewports as explained in the toolbar page
- Assign series to a viewport by selecting it or dragging from the sidebar as explained in the sidebar page
- Interact directly with the viewport through mouse, touchpad, and scrollbar controls as explained below
Each viewport displays information and controls around the viewport edges (when info overlay is enabled):
- Top right: Series name and patient name, mark key-object button
- Center bottom: Series navigation buttons
- Bottom right: Frame scrollbar with frame count, opacity/grayscale mode (3D only)
- Bottom left: Display parameters: window width/level, zoom level, pan, signal intensity (if enabled), reset windowing button
- Top left: Viewport action buttons: DICOM metadata popup, screenshot, cine, MIP, clear annotations, delete annotation, cancel in progress annotation
Interactions
Section titled “Interactions”The viewport supports various interaction methods for navigating and manipulating DICOM images. Each interaction impacts the viewport differently depending on the current mode (2D or 3D).
Mouse Scroll
Section titled “Mouse Scroll”Navigates through a series’ frames in 2D or zooms in/out in 3D mode.
Touch Pad Two Finger Scroll
Section titled “Touch Pad Two Finger Scroll”Navigates through a series’ frames in 2D or zooms in/out in 3D mode.
Touch Pad Pinch
Section titled “Touch Pad Pinch”Zooms in/out of the viewport.
Click Drag the Series Scrollbar
Section titled “Click Drag the Series Scrollbar”Navigates through a series’ frames by clicking and dragging the scrollbar located in the bottom right corner of the viewport.
Up/Down Arrow Keys
Section titled “Up/Down Arrow Keys”Navigates through a series’ frames using the keyboard arrow keys.
Left/Right Arrow Keys
Section titled “Left/Right Arrow Keys”Navigates to the next or previous series in the series sidebar within the active viewport.
Double Click
Section titled “Double Click”Quick zoom in or out relative to the viewport and the location where the double click occurred. Left or right double click is supported. Measurement and annotation mouse bindings take priority over double click.
DICOM Metadata
Section titled “DICOM Metadata”Displays detailed DICOM metadata information for the current series. The information popup appears when the button is clicked, showing patient information, study details, series parameters, and image acquisition settings.
Screenshot Viewport
Section titled “Screenshot Viewport”Captures a WebP image of the viewport without the information overlay. The screenshot includes annotations and cross reference lines if present, and is copied to the clipboard for pasting into other applications like report generation or chart notes.
Plays or pauses automated playthrough of the series. Once played once on a viewport, a frame rate adjustable scrollbar appears, allowing you to control the playback speed of the cine sequence.
Maximum Intensity Projection (MIP) displays the highest intensity values along a projection path through the volume, creating a 2D representation that highlights the brightest structures in the series.
Clear Annotations
Section titled “Clear Annotations”Clears all annotations on the current frame of the viewport. All other annotations on other frames in that series remain intact.
Delete Selected Annotation
Section titled “Delete Selected Annotation”Removes the currently selected annotation from the viewport. Use the viewport action button to delete the selected annotation, or press the Delete or Backspace key as a keyboard shortcut.
Cancel In Progress Annotation
Section titled “Cancel In Progress Annotation”Cancels an annotation that is currently being drawn before it is completed. Use the viewport action button to cancel the in-progress annotation, or press the Esc key as a keyboard shortcut.
Reset Windowing
Section titled “Reset Windowing”Resets the window width and level of the viewport to its default settings. The reset button appears in the bottom left display parameters alongside window, zoom, and pan values.
Navigate Series
Section titled “Navigate Series”Navigates to the previous or next series assigned to the viewport using the series navigation buttons in the center bottom of the viewport. This provides quick access to adjacent series without returning to the sidebar.
Mark Key Object
Section titled “Mark Key Object”Marks the current frame as a key object for the series. The mark key-object button appears in the top right of the viewport, next to the series name and patient name when the info overlay is enabled. The number of key-object frames for a series is indicated in the series sidebar.
Opacity/Grayscale Mode
Section titled “Opacity/Grayscale Mode”Appears in the bottom right of 3D mode and allows users to have more granular control over the transfer function for 3D rendering. This feature is designed for highly advanced users who need precise control over opacity and grayscale mapping in 3D volume renderings.