Samsung ACCUVIX XG Manual de usuario Pagina 268

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Operation Manual
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.
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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