Full Digital Color Doppler Ultrasonic Diagnostic Instruments (Vet) User’s Manual V1.01
- 55 -
10.5.4 PW Mode Measurements
Flow speed ratio, speed, time, heart rate, acceleration and spectrum trace measurements can be performed
in the PW mode. You can also press [BC Caliper] to enter the general measurements in the B mode. For
details, please refer to Section 10.5.1 B Mode Measurements.
10.5.4.1 Flow Speed Ratio
It is used to calculate the flow speed ratio and resistance index on the Doppler-mode image by measuring
the flow speed of peak systole (PS) and end diastole (ED).
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 [S/D] on the menu by moving the trackball and press
Set
to confirm. A marker displays on the image.
4.
Move the marker to the flow speed of peak systole by using the trackball, press
Set
to fix the marker
and the second marker displays.
5.
Move the second marker to the flow speed of end diastole by using the trackball and press
Set
.
The measurement result displays in the result box.
10.5.4.2 Velocity
It is used to measure the velocity of one point on the spectral Doppler waveform.
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 [Velocity] on the menu by moving the trackball and press
Set
to confirm. A marker displays on
the image.
4.
Move the marker to the desired point by using the trackball and press
Set
. The measurement result
displays in the result box.
10.5.4.3 Time
It is used to measure the time interval between two points on the spectral Doppler 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 [Time] 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.
10.5.4.4 Heart Rate
It is used to measure the time interval between heart cycles based on the number of heartbeats per minute
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.
