Image Optimization 5-13
5.4 Color Mode Image Optimization
The Color mode is used to detect color flow information, and the color is designed to
judge the direction and speed of blood flow.
Generally, the color above the color bar indicates the flow towards the probe, while the
color below the color bar indicates the flow away from the probe. The brighter the color,
the faster the flow speed, while the darker the color, the slower the flow speed.
5.4.1 Basic Procedures for Color Mode Imaging
1. Select a high-quality image during B mode scanning, and adjust to position the area
of interest in the center of the B mode image.
2. Press <Color> to enter B + Color mode. Roll the trackball to change the position and
size of the Region of Interest (ROI) and press the <Set> key to set.
3. Adjust the image parameters during scanning to obtain optimized images.
4. Perform other operations (e.g., measurement and calculation) if necessary.
5.4.2 Color Mode Image Parameters
In Color mode scanning, the image parameter area in the top-right corner of the
screen displays the real-time parameter values as follows:
Parameter F G PRF WF
Meaning Frequency Color Gain Pulse Repetition Frequency (PRF) Color Wall Filter
During Color mode imaging, the image optimizing menus for B mode and Color
mode are displayed on the touch screen at the same time. You can switch between
the 2 modes by clicking the mode tabs.
In Color mode, the acoustic power is synchronous with that of B mode. Adjustment of
the depth to the B mode image will lead to corresponding changes in Color mode
image.
5.4.3 Color Mode Image Optimization
Color Gain
Description Refers to the overall sensitivity to flow signals. This function is used to
adjust the gain in Color mode. The real-time gain value is displayed in the
image parameter area in the top-right corner of the screen.
Operations Rotate the <Color> knob clockwise to increase the gain, and counter-
clockwise to decrease it.
The adjusting range is 0-100 in increments of 2.
Effects Increasing the gain will increase the flow signal presented and noise. The
signals may be missing when the gain is adjusted too low.
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