Image Optimization 5-3
TGC
The system compensates the signals from deeper tissue by segments to
optimize the image.
There are 8-segment TGC sliders on the control panel corresponding to the
areas in the image.
To increase the gain compensation at an area of interest, move the TGC slider
to the right. To decrease the gain compensation at the corresponding area of
interest, move the TGC slider to the left.
About 1.5s after the adjustment is finished, the TGC curve disappears.
Adjust the signal gain for the certain image area to get a balanced image.
This function is used to select the operating frequency of the current probe,
the real-time value of which is displayed in the image parameter area in the
upper left corner of the screen, where “F” represents B mode frequency, and
“FH” represents harmonic frequency.
Adjust it through [Frequency] on the image menu, wherein “H” means the
harmonic frequency.
Values of frequency vary depending upon the probe types. Select the
frequency according to the detection depth and current tissue characteristics.
The higher the frequency the better the near field resolution but the worse the
force of penetration.
Harmonic imaging enhances near field resolution and reduces low-frequency
and large amplitude noise, so as to improve small parts imaging.
Refers to the power of ultrasonic wave transmitted by the probe, the real-time
value of which is displayed in the image parameter area in the upper left corner
of the screen.
Adjust through the [A. Power] item in the image menu;
Select the [A. Power] item, and press the <back> key to decrease acoustic
power, or press the <Set> key to increase acoustic power.
The adjusting range is 7%-100% in increments of 3%.
Generally, increasing the acoustic power will increase the brightness and
contrast of the image as well as the force of penetration.
You should perform exams according to actual situation and follow the ALARA
Principle.
Refers to adjustment of focus of the ultrasonic beams, symbols as " " of
which will be displayed on the right of the image.
Adjust the focus number through the [Focus Number] in the menu;
Adjust the focus position through the [Focus Position] in the menu;
In B Mode, focus number can be switched among 1-4.
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