
5-14
Operation Manual
D Trace
This is a basic measurement that is available in Spectral Doppler Mode only. You can specify a point in
a Spectral Doppler image and trace a curve from that point to calculate the velocity, integral value and
average velocity of blood ow.
1. Select the Soft Menu dial-button [1] D Trace. “D Trace” is displayed in the user information area.
2. Trace a curve. The method for measuring a curve is the same as in “2D Line Trace.”
3. When the measurement is nished, its result is shown on the screen.
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PSV: Peak Systolic Velocity
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EDV: End Diastolic Velocity
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PI: Pulsatility Index
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RI: Resistivity Index
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S/D: Ratio of PSV to EDV
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Vmax: Max Velocity
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Vmean: Mean Velocity
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PGmax: Max Pressure Gradient
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PGmean: Mean Pressure Gradient
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VTI: Velocity Time Integral
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PHT: Pressure Half Time
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Acc: Acceleration
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AccT: Acceleration Time
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Dec: Deceleration
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DecT: Deceleration Time
The equations used for D Trace measurement are as follows:
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NOTE:
If Application is set to Cardiac at Utility > Measure Setup > General > Caliper, the results
including Vmax, PGmax, PGmean, VTI, PHT, Acc, AccT, Dec and DecT will be shown on the screen.
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