6 - 10 Operator’s Manual
6 Image Acquisition
• When the ROI box is dotted line, roll the trackball to change the size.
• Press <Set> to switch between the solid line and the dotted line status.
The larger the ROI box is, the lower the frame rate becomes, and the lower the resolution and color
sensitivity will be.
Color Gain
Refers to the overall sensitivity to flow signals. The real-time gain value is displayed in the image
parameter area.
Rotate the <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.
Image Quality
Refers to the transmitting frequency in Doppler mode of the probe, the real-time value of which is
displayed in the image parameter area.
B/C Align
To set and constrain the maximum width of the B mode image to that of the Color ROI.
Dual Live
This function is used to display B image and Color image synchronously.
Steer
The feature is used to adjust the ROI of color flow with different angles with immobility of the
probe.
This function is used to adjust the scan angle of linear probes, so as to change the angle between the
transmitting beam and flow direction.
Steer is available only for linear probes.
Line Density
The function determines the quality and information of the image.
The higher the line density is, the higher the resolution becomes.
Packet Size
This function is an indication of the ability to detect flow, which is used to adjust the accuracy of
color flow.
0 represents no packet size control.
The higher the sensitivity is, the more sensitive indication for low-velocity flow becomes. It
affects the frame.
Flow State
Refers to optimizing the various flow states.
Persistence
This function is to adjust the temporal smooth to optimize the image.
0 represents no persistence. The bigger the value is, the stronger the effect becomes.
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