Image Optimization 5-23
Scale
Description This function is used to adjust the speed range of the 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-right corner of the screen.
Operations Rotate the knob under the [Scale] item on the touch screen.
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.
iTouch
Description To optimize image parameters as per the current tissue characteristics for
a better image effect.
Operations Press <iTouch> on the control panel to turn the function on.
Auto-Calculation
Description This function is used to trace the spectrum and calculate the PW/CW
mode image parameters. The results are displayed in the results window.
Tap [Auto Calc] on the touch screen to turn the auto calculation function
on or off.
Auto
Calculation
Parameter
Select parameters in the dialog box prompted by touching [Auto Calc
Param] on the Auto Calculation page.
Auto
Calculation
Cycle
To set the heart cycle number for auto-calculation.
Tap [Auto Calc Cycle] on the touch screen to select the cycle number, the
adjusting range is 1-5.
Trace Area To set the trace area of the Doppler wave in the spectrum map, applicable
for auto calculation, V Max and V Mean display.
To change the trace area, adjust through [Trace Area] item on the touch
screen.
The available selections of trace area are: Above, Below, All.
Invert
Description This function is used to set how the spectrum is displayed.
Operations Turn the function on or off using the [Invert] item on the touch screen.
Select “Auto Invert” in the “[Setup] (F10)Æ [System]Æ[Image]”, so the
spectrum can automatically invert when the color flow is steered to a
certain angle to accommodate the operator’s desire to distinguish the flow
direction.
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