5-18 Image Optimization
Persistence
Description This function is to adjust the temporal smooth in Color mode to optimize the
image.
Operation Adjust through the [Persistence] item in the menu or the soft menu.
The system provides 5 levels of persistence adjustment, 0 represents no
persistence and the bigger the value the stronger the effect.
Smooth
Description This feature is used to reject noise and smooth the image.
Operation Adjust through the [Smooth] item in the soft menu or menu.
The system provides 5 levels of smooth function, the bigger the value the
higher the smooth.
Scale
Description 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 will be
displayed in the image parameter area in the upper left corner of the
screen.
Operation Adjust the speed range through the [Scale] item in the menu or the soft
menu.
The adjusting range varies by frequency, probe and depth; adjust
according to the actual situation.
Effects To provide a much clearer color flow image.
Use low PRF to observe low-velocity flows, and high PRF to observe
high-velocity flows.
Impacts 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
Description 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.
Operation Adjust through the [Baseline] item in the soft menu or menu.
Positive value means to increase the signals above the baseline, and
negative value means to increase the signals below the baseline.
Impacts The function is available in real-time imaging, freeze or cine review status.
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