GE Voluson 730Pro, Service Manual

Page: 124 / 332

GE M
EDICAL
S
YSTEMS
- K
RETZTECHNIK
RAFT V
OLUSON
® 730P
RO
/ 730P
RO
V (BT´04)
D
IRECTION
KTI105947, R
EVISION
2 S
ERVICE
M
ANUAL
4-24 Section 4-4 - Functional Checks
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 SENSITIVITY of the envelope curve (to eliminate artifacts).
4.) Select the TRACE MODE 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 Measuements and other details refer to the Voluson® 730Pro / 730ProV
Basic User Manual, Chapter 13