User's Manual

Acclarix AX8 Diagnostic Ultrasound System User Manual Features
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4. Draw the trace along the endocardium of left ventricular.
5. Press Set key to fix the end point B and complete the trace. A new caliper positions
automatically at the apex (Point D) of the trace, connecting the Point C (Midpoint of point A
and B). This distance between point C and D is the longest detected by the system, as shown
below:
6. Move the caliper(Point D) to a new desired position if necessary.
7. Press Enter key to complete the measurement.
See Chapter 6 Cardiac in advanced manual for the detailed Simpson measurement and
calculation results and equations.
7.3.2.3. PISA
PISA (Proximal Isovelocity Surface Area) is a tool in Cardiac presets used for quantitative
analysis of regurgitation. It is only available in Color and Doppler mode.
To use PISA measurement in Color mode:
1. Adjust the color image until the aliasing appears. Invoke the Measure function.
2. Select PISA measurement on the touch screen and then select a measurement label from MR
Rad, MR Als. Vel, AR Rad, AR Als. Vel, TR Rad, TR Als.Vel, PR Rad and PR Vls. Vel. A
single caliper will be displayed on the image field.
3. Move the caliper and press Set key to position the caliper as the center of the semicircular.
4. Move the trackpad to adjust the radius length and orientation of the semicircular.
5. Press Enter key to fix the semicircular and then a dialog box of “Color Aliasing Velocity”
pops up.
6. Select “Top aliasing velocity”, “Bottom aliasing velocity”, or manually enter the aliasing
velocity from 0 cm/s to 500 cm/s.
7. Click OK and then measurement results are shown.
To use PISA measurement in Doppler mode:
1. Freeze a strip image. Invoke the Measure function.
2. Select PISA measurement on the touch screen and then select a measurement label from MR
Trace, AR Trace, TR Trace and PR Trace.
3. Use the Doppler trace tool to get the measurement results.
When all the measurements described above have been completed, the system automatically
calculates the Flow Rate, Flow and EROA(Effective Regurgitant Orifice Area). See Chapter 6
Cardiac in advanced manual for the detailed PISA measurement and calculation results and
related equations.