Chapter 4: Measurements and Calculations 71
Meas. & Calcs
Manual
Trace
1 On a frozen Doppler spectral trace, press the Caliper key.
2 Select Manual from the on-screen menu.
A single caliper is displayed on the screen. This caliper is used to
mark points on the trace.
3 Position the caliper at the beginning of the desired wave form and
press the Select key.
Note: If calipers are not placed in the correct position, the calculation
will not be performed accurately.
4 Use the touchpad to move the caliper to the next desired point on
the wave form.
5 Continue marking points by pressing the Select key.
The last point must be placed at the end of the wave form.
Note: If an error is made, use the backspace key to delete the previous
position.
6 Select Set from the on-screen menu to complete the trace and to
display the results.
7 Press the Save key to save an image of the trace with the results
displayed.
8 If performing a VTI, TAM, or S/D ratio, select Save from the
on-screen menu.
Automatic
Trace
Note: The optimum trace location is provided when live trace is turned on.
1 On a frozen Doppler spectral trace, press the Caliper key.
2 Select Auto from the on-screen menu.
A vertical caliper is displayed.
3 Use the touchpad to position the first caliper at the beginning of the
wave form.
4 Press the Select key.
A second vertical caliper is displayed.
Note: If calipers are not placed in the correct position, the calculation
will not be performed accurately.
5 Use the touchpad to position the second vertical caliper at the end
of the wave form.
6 Select Set from the on-screen menu to complete the trace and to
display the results.
7 Press the Save key to save an image of the trace with the results
displayed.
8 If performing a VTI, TAM, or S/D ratio, select Save from the
on-screen menu.
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