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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 [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.
8.4.3.5 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 [Acceleration] 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.
8.4.3.6 Spectrum Trace
It used to measure the velocity or other indexes for clinical diagnosis purposes by tracing one or
more Doppler waveforms. Manual trace and auto trace are available.
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.
Spectrum trace can only be performed in frozen PW mode.
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.