Segment; Segment Tab - GE Revolution CT User Manual

6 Segment

To display a specific feature within the image, you can define what part of the exam data should
be visible, and what part should not. The main Segment tools include:
Threshold: To extract a region of interest by selecting a range of voxel values that
•
represents a specific tissue or anatomical feature.
• Scalpel: To perform cuts in the 3D volume to define the region of interest.
• Paint: To mark the region of interest with colored paint and then display only this region.
• Auto Select: To select an object and add it on or remove it from the selected view.
The process of removing structures is sometimes referred to as
the 3D volume is segmented, or split, in two parts: the volume of interest that is currently
displayed, and the remainder that is removed from view.
After volume segmentation, the displayed part of the 3D model consists of one or more 3D
objects. A 3D object is a part of the 3D model that is separate from other parts. Two 3D objects
are separate if there is at least one voxel width of empty space between them.
Sometimes two seemingly separate objects still act as one, because they are still connected
somewhere by a bridge of voxels. It is also possible that a seemingly single object turns out to
consist of two or more parts, separated by narrow gaps. The tools on the
screen can help you to deal with these effects.

6.1 Segment tab

Segment tab contains Advanced Processing tools used to refine segmented objects or
The
combine them using Boolean operations. Before using the tools, perform an initial segmentation
with any of the Segment tools.
When a tool is clicked, a control panel for that tool displays.
Table 16: Segment selections
Function Name
482
Illustration 29: Segment tab
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
volume segmentation because
Advanced Processing
Description
6 Segment