
258 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1
Chapter 37: Acquiring PW Doppler Mode and PW Tissue Doppler Mode images
f To set your PW Doppler SV:
1. Begin acquiring data in Power Doppler Mode and position your transducer to
display your region of interest in the center of the B-Mode scout window.
2. If the PW Doppler Mode acquisition settings (page 256) are not displayed in
the left panel press
Mode Settings
.
3. Watching the B-Mode scout window, trackball to move the yellow wireframe
as close as possible to your region of interest.
4. Adjust the
SV/Gate
rocker switch forward or back to increase or decrease the
size of the SV.
After you change the position or size of the SV:
a. The system pauses briefly to reset the SV and update the Doppler SV
parameter values in the mode settings panel.
b. The system restarts the acquisition.
5. If your target vessel is at or near perpendicular to the transducer face, adjust
the
Beam Angle
to steer the beam to reduce the Doppler angle to a usable
degree.
6. Adjust the
Doppler Angle
dial to align the dashed yellow line as parallel as you
can to the axis of the vessel in the SV.
In the mode settings panel and in the upper left corner of the B-Mode scout
window, the system displays the updated angle degree value.
f To update your PW Doppler SV:
1. Press
Simul
to activate live image acquisition in the B-Mode scout window.
2. In the scout window, trackball to the new location, adjust the
SV/Gate
and
Doppler Angle
controls to set the sample volume.
3. Press
Simul
to return the scout window to a static image.
Setting the PW Doppler Mode sample volume in a distance blockout
zone
You cannot place an SV in a distance blockout zone because the frequency setting
is too high to produce useful detail at that depth.
However, if you try to set the SV in the blockout zone, the system automatically
lowers the frequency setting until there is enough detail to support the SV.
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