User's Manual

Acclarix LX3 Series Diagnostic Ultrasound System User Manual Imaging
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5.3 PW Mode
5.3.1. Using PW Mode
1. Perform the image scanning to get a good image in B mode or B+Color(DPI/DPDI) mode;
2. Press <PW> on the console to display sample line;
3. Use the trackball, <Angle> knob and other controls to adjust the position of the sample line and
the size and angle of the sample gate;
Note:
Pressing <Set> key can switch between the status of adjusting the position of the sample line and
adjusting the size of the sample gate.
4. Press <Update> on the console to enter B+PW or B+Color(PDI/DPDI)+PW mode and display
Doppler strip.
5. Adjust image parameters to optimize the Doppler strip.
6. When spectrum is displayed, pressing <Update> toggles between acquiring the Doppler strip and
acquiring the reference image.
5.3.2. PW Image Optimization
The following touch controls can be used to optimize the PW image.
Name Control Description
Scale
Scale adjusts the range of velocities that are displayed.
Upward presses increase scale and downward presses
decrease scale. Increasing scale when the PW cursor is
relatively deep may result in invoking HPRF, if it is configured.
See section 5.3.3 for details.
Baseline
The Baseline control adjusts the Doppler baseline. Upward
presses move the baseline up on the screen and downward
presses move the baseline down.
Invert
Normally, signals above the baseline are positive velocities
(moving toward the transducers). However, when Invert is
pressed, the negative velocities are displayed above the
baseline. Invert does not affect the baseline position.
Quick-Angle Adjusts the angle correct quickly to one of 60/0/-60.
Filter
The Filter control removes excessive noise from movement of
vessel walls. Options of Low, Med. and High are available.
Higher wall filter level will suppress more strong single of the
vessel walls, but low flow signal will be missing.