Mindray M5 Exp, Operator'S Manual

Page: 85 / 357

Image Optimization 5-5
Depth
Description
This function is used to adjust the display depth of sampling, the real-time
value of which is displayed on the image parameter area in the upper left
corner of the screen.
Operation
To change depth, press keys in the lower right corner of the control panel.
Press key to decrease the depth; Press key to increase the
depth. The adjustable depth values vary depending upon the probe types.
Effects
Increase the depth to see tissue in deeper locations, while decrease the
depth to see tissue in shallower locations.
Impacts
Depth increase will cause a decrease in the frame rate.
TGC
Description
The system compensates the signals from deeper tissue by segments to
optimize the image.
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.