Acclarix AX8/Acclarix AX7 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 <D> on the console to display sample line;
3. Use the trackbpad and touch controls to adjust the position of the sample line and the size and
angle of the sample gate;
4. Press <D> or <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.
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.
The Baseline control adjusts the Doppler baseline. Upward
presses move the baseline up on the screen and downward
presses move the baseline down.
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.
Adjust the Doppler scale to account for the angle between the
Doppler cursor and the blood flow. Upward presses increment
the angle. Downward presses decrement the angle. Angles
above 80 are not allowed.
Adjusts the angle correct quickly to one of 60°/0°/-60°.
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