Image Optimization 5-31
Gray Map
To provide a much clearer color flow image.
Use low PRF to observe low-velocity flows, and use 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.
iTouch
Description
To optimize image parameters as per the current tissue characteristics for a better image
effect.
Operation
Complete the image optimization via <iTouch>.
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
Tap [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.
Auto Calc
Loop
Freeze the image, turn the knob under [Auto Calc Loop] on the touch screen.
Rotate the knob clockwise to select the next loop.
Rotate the knob anticlockwise to select the last loop.
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] itemon the touch screen.
The available selections of trace area are: Above, Below, All.
Trace Smooth
To set the smooth level when tracing.
To change the trace area, adjust through [Trace Smooth] item on the touch screen.
There are 4 levels of smooth effect provided, the bigger the value, the higher the
smooth processing.
Trace
Sensitivity
This function is used to set the sensitivity of tracing in the spectrum.
To change the trace area, adjust through [Trace Sensitivity] item on the touch screen.
There are 5 levels of sensitivity adjustment, the bigger the value the higher the
sensitivity.
Operations
In real-time scanning, the results displayed are derived from the calculation of the latest
cardiac cycle.
In the freeze and cine status, the results displayed are calculated from the current
selected area.
