Doppler
LOGIQ 500 Basic Users Manual
2233658–100 Rev. 0
5–63
PW Doppler Mode Sub-Menu Page 4 (cont’d)
Trace Method
Description
Choose which method is used to trace the Doppler waveform in realtime. (Also found
in the CWD soft menu.)
Benefits
Front panel access through the VFD to change trace method.
Values
Select the default parameter to be traced in the Set Up/Custom Display menu
page 13.
Peak
Peak or highest values
Floor
Bottom or lowest values and peak
Mean
Average values and peak
Mode
Brightest echo trace and peak
Doppler Mode Optimization
Doppler Mode Optimization
Adjustments
for...
Do the Following...
Adjustments
for...
Do the Following...
Increase
Sensitivity
1.
Increase GAIN.
2.
Increase ACOUSTIC
OUTPUT.
3.
Decrease VELOCITY
SCALE (if flow state allows
it).
4.
Increase S.V. Length.
5.
Use lower frequency probe
or use lower Doppler
frequency on some
applications.
6.
Activate B-PAUSE to freeze
B-Mode image.
Scan angle is critical to Doppler
sensitivity.
Improve Display
Aesthetics
1.
Activate B PAUSE to freeze
B-Mode image.
2.
Decrease GAIN.
3.
Increase ACOUSTIC
OUTPUT.
4.
Use smaller sample volume
size, whenever possible.
5.
Increase/decrease Dynamic
Range.
6.
Adjust BASELINE SHIFT
and VELOCITY SCALE to
adjust spectral size.
7.
Lower Doppler Sweep
Speed.
Increase Spectral
Clarity
1.
Activate B PAUSE to freeze
B-Mode image.
2.
Increase ACOUSTIC
OUTPUT.
3.
Decrease S.V. Length.
4.
Decrease GAIN.
5.
Decrease Dynamic Range.