5-6 Image Optimization
Operation 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.
Effects Adjust the signal gain for the certain image area to get a balanced image.
Frequency
Description 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.
Operation You can select a harmonic frequency or a B mode frequency.
Adjust the frequency value through the [Frequency] item in the soft menu
or menu, “H” indicates harmonic frequency.
Or adjust it in the image parameter area.
Values of frequency vary depending upon the probe types.
Select the frequency according to the detection depth and current tissue
characteristics.
Effects 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.
Acoustic Power
Description 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.
Operation Adjust through the [A. power] item in the soft menu or menu.
The adjusting range is 7%-100% in increments of 3%.
Effects Generally, increasing the acoustic power will increase the brightness and
contrast of the image as well as the force of penetration.
Impacts You should perform exams according to actual situation and follow the
ALARA Principle.
Focus
Description
Refers to adjustment of focus of the ultrasonic beams, symbols as " " of
which are displayed on the right of the image.
Operation Adjust the focus number through the [Focus Number] in the soft menu or
menu.
Adjust the focus position through the [Focus Position] in the soft menu or
menu.
In B mode, focus number can be switched among 1-4.
Effects The area that is focused will be of a higher contrast and resolution to
provide a much clearer image.
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