6 - 6 Operator’s Manual
6 Image Acquisition
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.
The higher the sensitivity is, the more sensitive indication for low-velocity flow becomes.
Flow State
Refers to optimizing the various flow states.
Persistence
This function is to adjust the temporal smooth to optimize the image.
Smooth
This feature is used to reject the noise and smooth the image.
Scale
This function is used to adjust the speed range of color flow, which is adjusted through PRF in the
system. The real-time PRF value is displayed in the image parameter area.
Aliasing may occur if low velocity scale is used and high velocities are encountered.
Low velocities may not be identified when a high velocity scale is used.
Baseline
Refers to the area where the velocity is zero in the scale. Adjust according to the actual situation so
as to get an optimum flow display.
Color Map
This function is a combination of several image parameters, which indicates the display effect of
color image.
WF (Wall Filter)
It filters out low-velocity signals to provide effective information, and this function is used to adjust
the filtered frequency. The real-time value (WF) is displayed in the image parameter area.
Priority
This function is used to set levels of the flow display, to display the grayscale signal or color signal.
The color image is preferred with higher value; while grayscale signals are displayed with the lower
value.
iTouch
To optimize image parameters as per the current tissue characteristics for a better image effect.
6.4 Power Mode
Power mode provides a non-directional display of the blood flow in terms of intensity as opposed to
flow velocity.
DirPower (Directional Power mode) provides additional information of the flow direction toward
or away from the probe.
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