GE Vivid i User Manual page 106

Scanning Modes
Layout
Toggles the display arrangement to define relative dimensions
of the 2D area, Doppler-spectrum area, and their position
which is either top/bottom or side-by-side.
Color maps
Displays a drop down menu of different Doppler colorization
maps.Use the trackball to select the desired map and press
to activate the map.
SET
Quick angle and Angle correction
Enables correction of the Doppler velocity scale by defining the
In non-cardiac ap-
plications, Angle angle between the Doppler beam and the investigated blood
correction is con-
vessel or blood flow. A thin cross bar on the Doppler cursor will
trolled from the
rotate as the control is adjusted. Angle correction is available in
Trackball.
both Live and Freeze.
Quick angle adjusts the angle by 60 degrees.
Angle correction adjusts the angle between zero and
90 degrees with one degree increment.
PW/CW Doppler Soft menu controls
Sample volume
In PW mode, set the longitudinal size of the region to be
sampled for measurement. Adjusting Sample volume may
affect the PRF (Nyquist limit) settings. SV does not apply to
CW mode, where the volume sampled is the full length of the
area indicated by the cursor line.
Compress
Enables control over the contrast of the Doppler spectrum.
When compression is raised, the spectrum image becomes
softer and some low level background noise may appear.
Compress is available in both Live and Freeze.
Reject
Enables undesirable background noise to be removed from the
Doppler spectrum resulting in a darker background. Reject is
available in both Live and Freeze.
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Vivid i User's Manual
2378958-100 Rev. 02