11 Measurement and Report
Operator’s Manual 11 - 15
Perform the following procedure:
1. Tap [Auto Calc.] in the PW image menu to activate it.
The system traces automatically and displays the results on the screen.
2. Tap [Auto Calc] in the PW image menu. You can select the parameters to be calculated.
3. Tap [Auto Cardiac Cycle] in [Auto Calc] image menu. You can select the cycle number to be
calculated.
11.3.16PS/ED
Measures the Peak Systolic (PS) velocity and End Diastolic (ED) velocity on the Doppler spectrum,
and calculates their resistance index (RI), S/D and correction angle.
Perform the following procedure:
1. Select [PS/ED] in the measurement menu.
The cursor appears on the screen.
2. Move the cursor to the Systolic Peak and tap on the screen to fix the point.
3. Move the cursor to the Diastolic End and tap on the screen to fix the point.
11.3.17Volume Flow
Measures blood flow through a vascular cross section per unit time.
Perform the following procedure:
1. Select [Volume Flow] in the measurement menu. The submenu displays.
– Tap [Vas. Area] to select the method for calculating the area: dist. or trace.
– Tap [PW Scope] to select the scope to be traced.
2. Measure the vascular area.
3. Tap [TAMEAN] or [TAMAX] to calculate the volume flow.
Item Description Methods or formulae
Vas Area Dist. Obtain the area by measuring
the vascular diameter.
Vas . A re a = π × Vas Diam (cm)
2
/ 4
Trace Obtain the area using the trace
method.
Area in 2D General Measurements
TAMEAN Vol Flow(Area) - TAMEAN Vol Flow(A) (ml/min) = |Vas
TAMEAN (cm/s)| × Vas. Area
(cm
2
) × 60 (s)
Vas. TAMEAN - Time Averaged
Mean Velocity, obtained from the
Vas. Trace measurement.
TAMAX Vol Flow(Area) - TAMAX Vol Flow(A) (ml/min) = |Vas
TAMAX (cm/s)| × Vas Area (cm
2
)
× 60 (s)
Vas. TAMAX - Time Averaged
Maximum Velocity, obtained from
the Vas. Trace measurement.
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