Mindray TE7T - Page 78

5-16 Image Optimization
Operations
Adjust through [Smooth] on the menu.
The bigger the value the stronger the effect.
Scale
Description
This function is used to adjust the speed range of the color flow, which is
adjusted using the PRF in the system. The real-time PRF value is displayed in
the image parameter area in the top-left corner of the screen.
Operations
Use [Scale]to adjust PRF values.
Tap [-] or [+] to change the value slightly or drag the control directly.
Or you can pinch on the color bar on top-left corner of the screen to change the
value.
The adjusting range varies according to the frequency, probe and depth. Adjust
according to the actual situation.
Effects
Provides a much clearer color flow image.
Use a low PRF to observe low-velocity flows, and a high PRF to observe high-
velocity flows.
Impacts
Aliasing may occur if a 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.
Operations
Adjust through [Baseline]on the menu.
A positive value means increase the signals above the baseline, and a negative
value means increase the signals below the baseline.
Invert
Description
To set the display mode of the color flow. The color scale will be inverted when
the function is turned on.
Operations
Turn the function on or off using the [Invert] control.
Select “Auto Invert” in [Setup] -> [System] -> [Image], so the color bar can
automatically invert when the color flow is steered to a certain angle to
accommodate the operator’s desire to distinguish the flow direction.
Impacts
Auto invert function is available only for linear probes.
Color Map
Description
This function is a combination of several image parameters, which indicates the
display effect of the color image.
Operations
Select maps by using [Color Map] control.