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Operation Manual
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Manual Trace
A spectrum is traced manually. It is enabled in the menu in Spectral Doppler Mode.
1. Press Manual Trace in the Measurement menu. A measurement cursor appears over a
spectrum.
2. Trace the spectrum. The measuring method is the same as in “D Trace.”
3. When Trace is complete, the measurement results are displayed on the screen.
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Itemized Measurement
In the Measurement menu, select an individual item and take a measurement.
1. Press the Calculator button on the control panel after obtaining a desired image.
2. Select a desired item in the Measurement menu. The “+” cursor appears over a spectral
waveform.
3. Position the “+” cursor and press the Set button.
4. The measurement results for the selected item are displayed on the screen.
Item Type Unit Equation
PSV (Peak Systolic Velocity) Velocity cm/s or m/s
EDV (End Diastolic Velocity) Velocity cm/s or m/s
TAMV (Time Average Mean Velocity) Velocity cm/s or m/s
TAPV (Time Average Peak Velocity) Velocity cm/s or m/s
PGmean (Mean Pressure Gradient) Calculation mmHg
PGmax (Max Pressure Gradient) Calculation mmHg 4 × PSV
2
S/D (Ratio of PSV to EDV) Calculation Ratio (PSV / EDV)
D/S (Ratio of EDV to PSV) Calculation Ratio EDV /PSV
RI (Resistivity Index) Calculation Ratio (PSV – EDV) / PSV
PI (Pulsatility Index) Calculation Ratio (PSV – EDV) / TAPV
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