GE H48651KR, Руководство по обслуживанию

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GE V
OLUSON
i / V
OLUSON
e
D
IRECTION
KTI106052, R
EVISION
10 S
ERVICE
M
ANUAL
Chapter 4 - Functional Checks 4-23
4-4-7 Generic Measurements
(cont’d)
4-4-7-4 Measurements in Spectral Doppler Mode
NOTE: The Spectral Doppler image is displayed based on time (X-axis) and velocity (Y-axis).
4-4-7-4-1 Auto Trace
1.) Press the
CALIPER
key.
2.) Select AUTO TRACE item from the menu area on the left side of the screen.
It traces the Spectral Doppler image automatically and displays the results.
3.) Select the
SENS.
(Sensitivity) of the envelope curve (to eliminate artifacts).
4.) Select the
TRACE
channel of the envelope curve (upper, both, lower).
5.) If necessary, select the Angle and the Baseline.
6.) Press the right or left trackball key
SET
to finish the measurement.
Before you complete the measurement:
- To readjust the start cycle (vertical yellow line), press
CHANGE
(upper trackball key).
Press
SET
(right or left trackball key) to fix the line.
- Press the
CHANGE
key again to readjust the end cycle (vertical green line).
Press
SET
to fix the line.
NOTE: The determination of the envelope curve requires a clear and low-noise record of the Doppler
spectrum. Otherwise the reliability of the displayed measurement results may not be ensured!
4-4-7-4-2 Manual Trace
1.) Press the
CALIPER
key.
2.) Select the MANUAL TRACE item from the menu area. A cursor appears on the screen.
3.) Move the cursor with the
TRACKBALL
to the start point of the measurement and press
SET
(right or left trackball key) to fix the marker.
4.) Trace to the end of the period and press the
SET
key again to fix the mark.
The measurement results appear on the screen.
Before you complete the measurement:
To readjust the traced line, press
UNDO
(upper trackball key) repeatedly.
4-4-7-4-3 Heart Rate
1.) Press the
CALIPER
key.
2.) Select the HR item from the menu area. A line appears on the screen.
3.) Move the line with the
TRACKBALL
to the start point of the period and press
SET
(right or left
trackball key). A second line appears.
4.) Move the second line to the end point of the period.
5.) Select the number of “HR cycles” for the measurement with the digipot.
6.) Press the
SET
(right or left trackball key) again to fix the line. The Heart Rate is displayed.
NOTE: For further Doppler Measurements and other details refer to the Voluson i / Voluson e Basic User
Manual, Chapter 13