6 Image Acquisition
Operator’s Manual 6 - 13
Because both are based on Doppler color imaging, the adjustments of Power mode are same with
these of Color mode’s. Hence, only the adjustments of Power mode are introduced.
Power Gain
Refers to the overall sensitivity to flow signals, and this function is used to adjust the gain in Power
mode. The real-time gain value is displayed in the image parameter area.
Rotate <C> knob clockwise to increase the gain, and anticlockwise to decrease.
Increasing the gain will increase the flow signal presented as well as noise, while the signals may be
missing when the gain is adjusted too low.
Color Map
This feature indicates the display effect of power image. The maps in Power mode image are
grouped into two categories: Power maps and Directional Power maps.
• The Power maps provide information of blood flow, which are highly sensitive to the low-
velocity flows.
• The Directional Power maps provide information of flow direction.
Dynamic Range (Dyn Ra.)
This function is to adjust the transformation of echo intensity into color signal.
Increasing dynamic range will lead to higher sensitivity to low-power signals, thus enhances the
range of signals to display.
6.5 M Mode
• During M mode imaging, menus of image optimizing for B mode and M mode are displayed
on the touch screen at the same time. You can switch between the 2 modes by tapping the
mode tabs.
• During M mode scanning, the frequency, depth, and acoustic power of the probe are
synchronous with that of B mode.
6.5.1 M Mode Image Scanning
Perform the following procedure:
1. Select a premium image during B mode or B+ Color scan, and adjust to place the area of
interest in the center of the image.
2. Press <M> on the control panel, and use the trackball to adjust the sampling line.
3. Press <M> on the control panel again or <Update> to enter M mode, and then you can observe
the tissue motion along with anatomical images of B mode. During the scanning process, you
can also adjust the sampling line accordingly when necessary.
4. Adjust the image parameters to obtain optimized images.
PRF Pulse Repetition Frequency PRF
Items Meaning
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