GE Healthcare Brivo XR118 Service Manual page 289

GE H
EALTHCARE
D 5461425-8EN, R
IRECTION
Parameter
Contrast
Adjust
Brightness
Adjust
Tissue
Contrast
Edge
Noise
Reduction
6
EVISION
Table 12-12 Image Processing parameters
Adjusts image contrast. Also known as window width.
• Move the slider right for more contrast (towards pure black and
white).
• Move the slider left for less contrast (towards uniform gray).
Range: 25% - 400% with increment of 1%
Adjusts image brightness from 25 - 210%. Also known as window level.
• Move the slider right for a lighter image.
• Move the slider left for a darker image.
Note:
Brightness Adjust and Contrast Adjust are used to modify the look of
images from a particular exam. They should not be used for per-image
tuning/correction of brightness and contrast. For example, if images
from a particular type of exam are appearing consistently lighter
than they should be, the Brightness Adjust slider can be moved left
to adjust. However, for small alterations of brightness on a
particular image, use the Brightness and Contrast sliders in the
Image Viewer screen.
Controls the general contrast between the thick and thin anatomy.
• Move the slider right to decrease bone/soft-tissue contrast.
• Move the slider left to increase bone/soft-tissue contrast.
Range: -0.15 to 0.15 with 0.01 increments.
Note:
Unlike Tissue Equalization, which controls contrast within under-
penetrated (thick) or over-penetrated (thin) areas, Tissue Contrast
controls the general contrast between the thick and thin anatomy.
For example, Tissue Contrast can be used in combination with Tissue
Equalization to define a Chest PA look that is equalized in the lung
fields, but with light spine/ribs.
The amount of detail visible in bone structures. Increased edge
equals increased detail.
• Move the slider right to make images sharper.
• Move the slider left to make images smoother.
Range: 1 to 10 (discrete setting)
Suppresses the mottle noise in denser areas of the anatomy while
preserving detail in the rest of the image.
Available options are:
• None - no noise reduction
• Low
• Medium
• High - maximum noise reduction
Note:
The noise reduction feature suppresses the mottle noise in denser
areas of the anatomy while preserving detail in the rest of the image.
The algorithm takes into account tissue penetration and dose reaching
the detector. For example, if two Chest PA images were acquired on
the same patient, one with much higher dose than the other, noise
reduction may only affect the lower dose (higher noise) image. In
general, the lowest Noise Reduction setting that produces the desired
image quality should be selected.
Chapter 12 - - Set Preferences
B XR118 S
RIVO
Definition
M
ERVICE ANUAL
Page 289