Need Segmentation Tools?

Access note: This feature is only visible when the relevant add-on has been enabled for the study and assigned to your user account. If you cannot see it, contact your Trial Administrator or main study contact. Trial Administrators can review add-on access in Edit User Access.

Use Image Quantification when the study requires manual segmentation, labeled annotations, or quantitative image analysis in the viewer.

Typical Users

Readers
Analysts
Other users assigned quantification tasks

What Problem It Solves

This feature adds segmentation tools to the viewer so users can outline regions of interest, apply labels, and upload segmentation results.

How to Open It

From the Visit Dashboard, click Analyze to open the viewer with the segmentation toolbar enabled.

How It Works

Example – Manual Segmentation of CT Stack

The usual workflow is:

Select a segmentation label.
Draw or refine the segmentation with the available tools.
Upload the segmentation to SliceVault.

Helpful Shortcuts

Viewing

X toggles segmentation opacity
ALT + scroll wheel adjusts segmentation opacity
L shows or hides all labels
Tab + mouse hover shows the label name

Drawing

E + left mouse draws with the pencil
E + right mouse erases with the pencil
G + left mouse uses bucket fill
Ctrl + R + left mouse uses the polygon tool
Ctrl + Z undoes the last step
Ctrl + Y redoes the last undone step

Advanced Controls

Y + scroll wheel sets the high HU threshold
H + scroll wheel sets the low HU threshold
I removes marked pixels outside the largest connected region
D fills holes in the current label
Ctrl + Alt + S uploads the segmentation to the server

For general viewer controls and navigation, see DICOM Viewer.