5-12 Image Optimization
Operation Adjust through the [Steer] item in the soft menu, or rotate the
multifunctional knob to adjust.
Values of steering angles vary by probes.
Effects 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.
Impacts Steer is available only for linear probes.
Line Density
Description The function determines the quality and information of the image.
Operation Adjust through the [Line Density] item in the soft menu.
There are 2 levels of line density provided: UH, H, M, L.
Effects The higher the line density, the higher the resolution.
Impacts The higher the line density, the smaller the frame rate.
Packet Size
Description This function is an indication of the ability to detect flow, which is used to
adjust the accuracy of color flow.
Operation Adjust through the [Packet Size] item in the soft menu.
There are 4 levels of packet size provided, 0 represents no packet size
control and the bigger the value the higher the sensitivity.
Effects The higher the packet size, the more sensitive indication for low-velocity
flow.
Impacts Increasing the packet size will lead to frame rate decrease.
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.
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.
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