Functional checks
Vivid T9/Vivid T8 – Basic Service Manual 4-27
5795591-100 English Rev. 3
4-3-20 PW/CW Doppler Mode Checks
4-3-20-1 Introduction
PW and CW Doppler are used to measure velocity (most often
in blood).
Doppler mode can be done with a special pencil probe or with
an ordinary probe. By using an ordinary probe, you can first
bring up a 2D picture for navigation purpose and then add PW/
CW Doppler.
4-3-20-2 Preparations
• Connect one of the probes to the scanner.
• See 4-3-25 ‘Probe/Connectors Check’ on page 4-31 for info
about connecting the probes.
For available probes, see 9-3-2 ‘Probe’ on page 9-5: .
• Turn ON the scanner
The 2D Mode window is displayed (default mode).
• If needed, adjust the Display’s Brightness and Contrast
setting.
Press PW or CW to start Pulsed Wave Doppler (PW) or
Continuous Wave Doppler (CW).
Use the trackball to select the Area of Interest (Sample
Volume) in PW or direction of interest in CW.
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