Display A Vr Image - GE Revolution CT User Manual

Function Name
White box
Blue Box
Red Box
VR Ramp
Color
Partial Volume Filter
Active Color
Transition
Brightness

5.7 Display a VR image

Use these steps to display a Volume Render image and the VR tab on the Tools screen.
Reformat .
1. Open
2. Right-click the View Type active annotation and select
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Description
Represents the Opacity Threshold values. When using Ramp-up shape:
• Drag the lower white box to the right to remove soft tissue from an exam to modify the maximum
opacity of voxels.
•
Click the upper white box at the top of the ramp and drag up or down to modify the opacity of all
visible voxels.
Allows you to shift the whole ramp. Click and drag the solid blue box on the ramp to change the upper
and lower values of the ramp.
Represents the scale of voxel values. Click and drag the box left or right to shift the display.
• Zoom in or out with the Zoom icons upper-right corner.
• Right-click the main control to return to the original zoom.
Represents the voxel opacity in the VR images as a function of the voxel values. It means that voxels
with identical value will have the same opacity.
Activates the color. An unchecked box displays the VR in black and white.
Attenuates the partial volume by associating partial volume voxels with adjacent voxels that represent
the more opaque object. It improves the visibility of structures that would otherwise be hidden by parti‐
al volume voxels and improves the color coding of voxels in color mode.
Use to select the active color. Click the square color button below the ramp (the triangle above the
color gets black). Click Active Color to change the color.
•
Smooth: shaded transition from one color to the next.
•
Step: all voxels inside the value range display the same color. When Step is selected small white
diamonds indicating range borders display. Click the diamonds to adjust precisely range of val‐
ues that are assigned to each color.
The amount of light displayed in the model. Type in a value greater than 100 to increase the light in
the model.
Revolution CT User Manual
Direction 5480385-1EN, Revision 1
VR .
5 Volume Render