Full Digital Color Doppler Ultrasonic Diagnostic Instruments (Vet) User’s Manual V1.01
- 56 -
3.
Select [HR] on the menu by moving the trackball and press
Set
to confirm. A marker displays on the
image.
4.
Move the marker to the starting point by using the trackball, press
Set
to fix the marker and the second
marker displays.
5.
Move the second marker to the end point by using the trackball and press
Set
. The measurement result
displays in the result box.
10.5.4.5 Acceleration
It is used to calculate the flow speed difference in the time interval from two measured flow speeds on the
PW mode image.
Steps:
1.
Press the
PW
key on the control panel to enter the PW mode.
2.
Press the
Caliper
key to activate the measurement, and the measurement menu displays on the top left
of the screen.
3.
Select [Accelation] on the menu by moving the trackball and press
Set
to confirm. A marker displays
on the image.
4.
Move the marker to the starting point by using the trackball, press
Set
to fix the marker and the second
marker displays.
5.
Move the second marker to the end point by using the trackball and press
Set
. The measurement result
displays in the result box.
10.5.4.6 Spectrum Trace
It used to measure the velocity, Pressure gradient or other indexes for clinical diagnosis purposes by tracing
one or more Doppler waveforms. Manual trace and auto trace are available.
Manual trace
Steps:
1.
Press the
PW
key on the control panel enter the PW mode, then press
Freeze
key.
2.
Press the
Caliper
key to activate the measurement, and the measurement menu displays on the top left
of the screen.
3.
Select [D Trace] on the menu by moving the trackball and press
Set
to confirm. Select[Manual] on the
pop-up menu. A marker displays on the image.
4.
Move the marker to the starting point of peak waveform of the end systole by using the trackball, press
Set
to fix the marker and the second marker displays.
5.
Trace the waveform and move the second marker to the end diastole which is one cardiac cycle
adjacent to the first marker by using the trackball and press
Set
. The measurement result displays in the
result box.
Auto trace
Steps:
1.
Press the
PW
key on the control panel to enter the PW mode, then press
Freeze
key.
2.
Press the
Caliper
key to activate the measurement, and the measurement menu displays on the top left
of the screen.
3.
Select [D Trace] on the menu by moving the trackball and press
Set
to confirm. Select [Auto] on the
pop-up menu. A marker displays on the image.
Attention:
1.
To ensure the measurement accuracy, you should position the first marker on peak
systole and position the second marker on end diastole during the trace measurements.
2.
Spectrum trace can only be performed in frozen PW mode.
