GE LOGIQ 7, Basic User Manual

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Optimizing the Image
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16 LOGIQ 7 Online Help
Direction 2392536-100 Rev. 1
Virtual Convex
Description On Linear and Sector probes, Virtual Convex provides a larger
field of view in the far field.
Adjusting To activate/deactivate Virtual Convex, select Virtual Convex .
Values On/Off.
Benefits Virtual Convex can be especially helpful in Obstetrics. Available
in B-Mode, Color Flow Mode, and Doppler Mode.
Bioeffects Activating Virtual Convex may change the TI and/or MI. Observe
the output display for possible effects.
NOTE: Color Flow can be steered when in straight fire, but not in Virtual
Convex.
TGC
Description TGC amplifies returning signals to correct for the attenuation
caused by tissues at increasing depths. TGC slide pots are
spaced proportionately to the depth. The area each pot
amplifies varies as well. A TGC curve may appear on the display
(if preset), matching the controls that you have set (except
during zoom). You can choose to deactivate the TGC curve on
the image.
Adjusting To decrease/increase TGC, move slide pot to the left/right.
NOTE: On some systems, active slide pots backlight.
NOTE: TGC adjusts automatically when using zoom. The TGC curve
does not change while in CINE.
Values When you change the depth, TGC is rescaled across the new
depth range. Each pot is proportionately scaled across the
depth.
Benefits TGC balances the image so that the density of echoes is the
same throughout the image.