Illustration 20: VR Controls screen
Table 15: ROI selections
Function Name
Description
Ramp Defines the opacity curve shape.
•
Step:
surface type rendering displaying structures with high voxel values.
•
Ramp-up:
displays structures with high values typically vessels and bone.
•
Ramp-down:
displays structure with low values typically airways.
•
Plateau:
displays structures within a given range.
•
Valley:
use with cut plane to create endo-luminal view.
•
Attach mode:
used to apply multiple plateau ramps attaching colors to ranges of voxel values.
Enhance Contours Enhances boundaries of structures. This is useful to display vessels or orthopedic cases.
Transparency Makes internal objects transparent and makes objects boundaries more visible.
Zoom Zoom in or out to modify the range of voxel values displayed.
Histogram Displays the voxel distribution (number of voxels per voxel value) in the image. Peaks correspond to
voxel values that are highly represented in the image.
Vertical Red Line Represents the numerical value of the voxel at the location of the 3D cursor. Moving the 3D cursor on
the image will change the location of the red line.
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
Chapter 16 Reformat 473
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