4.2.5
4.2.6
TGC
Description Ultrasonic wave attenuates when transmitting inside tissue, so the received
signals of deeper tissue are weaker than those of superficial tissue. The system
compensates the signals from deeper tissue by segments to make the image of
deeper issue clear. Adjusting TGC (Time Gain Compensation) will amend the
compensation.
Operations Slide the TGC sliders on the control panel to adjust the corresponding TGC.
When toggling TGC slider, the TGC curve is displayed on the left of the screen
and changes with the movement of the slider. About 1.5s after the adjustment is
finished, the TGC curve disappears.
Effects Slide the TGC slider right to increase the compensation to this segment and the
corresponding area gets brighter. Slide the TGC slider left to decrease the
compensation to this segment and the corresponding area gets darker.
Impacts The adjustment to TGC will influence the cine review.
Operation
Conflicts
When the image is frozen, the adjustment to TGC is unavailable temporarily and it
takes effect after the image is defrozen.
Focus
Number of focuses
Description Changes the number of focuses.
Operations Press <Menu> to open B Img Menu, and move cursor to [Focus Number (num)].
Press <Set> to increase the number of focuses and press <Back> to decrease the
number of focuses.
The “X” mark in the depth scale shows a focus.
Effects /
Impacts Increasing number of focuses will decrease the frame rate.
Changing number of focuses will clear the cine memory.
Operation
Conflicts
The number of focuses cannot be changed when the image is frozen.
Position of focuses
Description Changes the position of focuses.
Operations Press <▲> of <F.position> to move the focus closer to the transducer and press
<▼> to move the focus farther from the transducer.
The “X” mark in the depth scale shows the current position of the focuses.
Effects /
Impacts Changing position of focuses will clear the cine memory.
Operation
Conflicts
The position of focuses cannot be changed when the image is frozen.
4-4 Optimizing the Image
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