GE Vivid S6 - Optimizing PW;CW Doppler Modes

Scanning Modes
168 Vivid S5/Vivid S6 User Manual
R2424458-100 Rev. 2
Optimizing PW/CW Doppler modes
Refer to page 593
about creating pre-
sets
The use of preset gives optimum performance with minimum
adjustment. If necessary, the following controls can be adjusted
to further optimize the PW/CW modes display:
• Adjust the Active mode gain to set the gain in the spectral
Doppler area.
• Adjust Low velocity reject to reduce unwanted low
velocity blood flow and tissue movement.
• In PW mode, adjust Sample volume to low setting for
better resolution, or higher setting to more easily locate the
disturbed flows.
• Adjust the Compress setting to balance the effect of
stronger and weaker echoes and obtain the desired
intensity display.
Frequency and
Frame rate settings
may affect the Low
Velocity Reject.
• Adjust Frequency to optimize flow display. Higher setting
will improve resolution and the lower setting will increase
the depth penetration.
• Adjust Frame rate to a higher setting to improve motion
detection, or to a lower setting to improve resolution.
The Doppler Power
setting affects only
Doppler operating
modes.
• Adjust Power to obtain an acceptable image using the
lowest setting possible. This is particularly important in CW
mode, as the energy duty cycle is 100% (constant).
Adjust the following settings to further optimize the display of
the image.
• Use the Horizontal sweep to optimize the sweep speed.
• To view signal detail, use the Velocity range to enlarge the
vertical spectral Doppler trace.
• Use Invert to reverse the vertical component of the spectral
Doppler area of the display.
When Zoom is ac-
tive while in PW or
CW modes, use the
Depth rocker but-
ton to adjust the
zoom magnifica-
tion factor
• Use Angle correction to steer the ultrasound beam to the
blood flow to be measured (Not typically required during
cardiac studies).
CAUTION
Use all noise reduction controls with care. Excessive
application may obscure low level diagnostic information.