GE Voluson i BT06, Руководство по обслуживанию

Страница: 203 / 516

GE V
OLUSON
i / V
OLUSON
e
D
IRECTION
KTI106052, R
EVISION
10 S
ERVICE
M
ANUAL
Chapter 4 - Functional Checks 4-11
4-4-3 Spectral Doppler Mode Checks
Figure 4-7 PW Main and PW Sub
Table 4-5 Spectral Doppler Mode (PW) Functions
Step Task Expected Results
1
Gate Position and Angle
Adjust the G-POS (Gate position) or the ANGLE (cursor can be turned in both
directions without stop) with the trackball.
The
upper trackball key
changes from Gate position to Angle correction.
2
Activation of Doppler Mode
Press the
right trackball key
to activate the motion display.
Press the
left trackball key
to activate PW time-line and 2D/Color.
3
Doppler Gain
Rotate the
ACTIVE MODE
rotary control to adjust the sensitivity (brightness) of
the Doppler trace.
4
Steering
Press the
STEERING <-
/
STEERING ->
key on the alphanumeric keyboard.
This function is only possible with linear probes.
5
RTT (Real Time Auto-Trace)
The envelope curve of the Doppler spectrum (maximum velocities) and the
corresponding evaluations are automatically displayed on the monitor.
6
Doppler Spectrum Invert
Press the
DOP INV
key on the control panel to invert the Doppler spectrum
display in relation to the direction of the flow.
7
GATE SIZE Press the Soft-menu buttons to adjust the size of the doppler Gate.
8
WMF (Wall Motion Filter)
Press the Soft-menu buttons to eliminate Doppler “noise” that is caused by vessel
wall motion.
9
AUDIO
Press the Soft-menu buttons to adjust the volume of the audio signal derived from
the PW spectrum.
10
BASELINE
Press the Soft-menu buttons to move the baseline up/down.
Adjusting the baseline is possible in read- and write Mode.
11
SPEED Press the Soft-menu buttons to select different sweep speeds.