GE Healthcare Brivo XR118, Руководство по обслуживанию

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Chapter 12 - - Set Preferences Page 293
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ERVICE
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ANUAL
TE parameters
TE uses the information in the image to improve visualization. Two user-defined
parameters; AREA and STRENGTH; control the extent and amount of TE that is
applied to the image. There is an AREA and STRENGTH parameter for over-
penetrated regions and an AREA and STRENGTH parameter for under-penetrated
regions.
Area
The AREA parameter defines the extent of application of the TE algorithm to the
image. Increasing AREA increases the number of image pixels to which TE is
applied. For example, in
Figure 12-32 , setting the AREA to 30% for under-
penetrated region uses the pixels within the dotted ROI. Increasing AREA to 60%
increases the number of pixels where TE is applied, as indicated by the solid
ROI.
Figure 12-32
Using the AREA parameter in TE
The combined AREA parameters for the over and under-penetrated regions cannot
be greater than 100%. For example if the AREA parameter for over-penetrated
regions is set to 40%, the AREA parameter for under-penetrated regions cannot
be greater than 60% (100-40).
Strength
The STRENGTH parameter affects the grayness of a region when TE is applied to
it. For example, increasing STRENGTH for under-penetrated regions such as
shoulders makes a white region grayer. Increasing STENGTH for over-penetrated
regions such as lungs makes a black region grayer. In both cases, increasing
STRENGTH generally makes the region grayer.
The effect of varying AREA and STRENGTH in TE is demonstrated in Figure 12-33
for under-penetrated regions. Increasing STRENGTH while keeping the AREA
constant makes the pixel grayer in the shoulder region. Increasing AREA extends
the region that becomes gray.