GE Vivid i, User Manual

Page: 135 / 388

Measurement and Analysis
Vivid i User’s Manual
125
2378958-100 Rev. 02
anchor point position
• Time difference (dT) between anchored points position
The measurement
display on the spec-
trum and the corre-
sponding result are
numbered. 9. To assign a label to the measurement, see page 115.
10. Repeat steps 5 through 8 to make additional
measurements.
Manual Doppler trace measurements
Adjust Compress
and reject controls
to optimize the
Doppler signal.
1. Generate the spectrum to be measured.
2. Press
FREEZE
to stop the cineloop.
3. Press
MEASURE
on the Control Panel.
4. Select Manual trace in the Measurement Menu .
A vertical green cursor is displayed on the spectrum.
5. Trackball the cursor to the start point on the left side of the
trace.
6. Press
SET
to anchor the start point of the measurement.
7. With the trackball , trace the Doppler envelope.
The trace can be adjusted, while tracing, by moving the
cursor backward to erase portion of the trace (or the entire
trace) and then create the trace again.
The measurement
display color on
spectrum changes
from green to red af-
ter completion of
the measurement. 8. Press
SET
to complete the trace.
The following measurement results are displayed in the
Measurement result table :
• Maximum and mean Velocities
• Maximum and mean pressures
• Env. Ti
• Velocity time integral (VTI)
9. Trackball the cursor to the start point of the next heart beat.
10. Press the
SET
to anchor the next heart beat starting point.
The heart rate (BPM) is displayed in the Measurement
result table .
Automatic Doppler trace measurements
Adjust Compress
and reject controls
to optimize the
Doppler signal. 1. Generate the spectrum to be measured.
2. Press
FREEZE
to stop the cineloop.
3. Press
MEASURE
on the Control Panel.
4. Select Auto Trace in the Measurement Menu .
A vertical green cursor is displayed on the spectrum.
5. Trackball the cursor to the starting point.