3 S ystem C ontrols
3 - 78 [ 1 ] I N S T R U C T I O N S F O R U S E
Volume Toolbar Selections
The system displays the volume toolbar on the left of the volume quadrant
when you position the trackball cursor on the volume quadrant.
Volume Toolbar Selection Description Icon
Contrast/ Brightness
Adjusts the contrast and/or brightness of the volume. Roll the
trackball to the left or right to adjust contrast. Roll the trackball up
or down to adjust brightness.
Note: This selection is also available on the LCD.
Auto-Brightness
Automatically assigns optimal values for the contrast and
brightness to the volume.
Note: This selection is also available on the LCD.
[Rendering Method]
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Shaded
Emphasizes the shaded, rough portions of the volume, which can
help distinguish portions of the volume surface.
Brightest
Emphasizes volume data with peak brightness values.
X-Ray
Emphasizes volume data with average brightness values and
increases translucence.
Planes
Displays a colored plane for each slice in the volume quadrant.
(The green plane represents the slice in the yellow-outlined
quadrant. The other planes are each colored to match the outline
of the quadrant containing the represented slice.) Indicates the
orientation and position of the slices in relation to the volume.
Opacity
Adjusts the low and high thresholds for opacity (Noise Cut and
Penetration, respectively), as applied to the volume. Roll the
trackball up or down to adjust Noise Cut. Roll the trackball left or
right to adjust Penetration.
Note: This selection is available for the Shaded rendering
method only.
Surface Cleaner
Changes the applied opacity curve by either widening or
narrowing the range between Noise Cut and Penetration.
Roll the trackball up to narrow the range and create a more
saturated image. Roll the trackball down to widen the range and
increase detail resolution.
Zoom
Magnifies the volume. Roll the trackball up or to the right to
increase magnification. Roll the trackball down or to the left to
decrease magnification.
Note: This selection is not available for the Planes rendering method.
Shift
Shifts the volume in the direction of trackball movement.
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