GE Healthcare Brivo XR118, Руководство по обслуживанию

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XR118 S
ERVICE
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ANUAL
Page 292 Chapter 12 - - Set Preferences
Tissue Equalization Overview
Tissue Equalization (TE) is an advanced image-processing algorithm that
improves contrast and visibility in over-penetrated and under-penetrated
regions of an image without compromising the contrast in other regions of
interest. In combination with the wide dynamic range of the GE Revolution?
digital detector, TE allows display of more information collected in a single
shot, reducing re-takes and increasing throughput.
TE Usage
Over-penetrated Regions
An over-penetrated region in an image results from x-rays passing through a
relatively less dense region of the anatomy such as soft tissue (skin edge).
Over-penetrated regions of an image appear darker with reduced contrast. Using
TE, the contrast in such regions can be enhanced to improve visualization of
soft-tissue. TE can also be used to enhance vessel contrast in lungs. In
Figure
12-31 , the skin edge around the neck is more clearly defined with TE.
Under-penetrated Regions
An under-penetrated region in an image results from insufficient x-rays passing
through relatively dense anatomical regions. For example, anatomy containing
dense tissue (abdomen) and bone (ankles/wrists/shoulders) result in under-
penetrated images.
Under-penetrated regions of an image such as the cervical and thoracic spine
appear white- white spine obscured by the overlaying anatomy like the white
shoulders. Using TE, the overlaying anatomy can be made grayer making the
underlying spine more visible (
Figure 12-31 ). A hand image can similarly be
displayed with improved bone contrast. This makes TE an invaluable tool in
visualizing the entire bone field.
Figure 12-31
Comparison with and without Tissue Equalization