6. Roll the trackball and press Set to complete the measurement, and the
calculation result will be displayed in the measurement result window.
7. Roll the trackball and press Set to begin a new stenosis measurement.
You can measure a maximum of eight groups of data. The outcome
will be displayed in the measurement result window.
8. Press Caliper to finish and exit.
Figure 6-10 Distance Stenosis Measurement and the Results
Area stenosis
To determine the area stenosis, perform two area measurements: A and B.
The system calculates the stenosis: (A-B)/A * 100%.
To measure area stenosis:
1. Press Caliper to activate generic measurement function.
2. Roll the trackball to highlight % Stenosis, and select Area, and then
press Set to activate a measurement cursor on the screen.
3. Measure the first area with the ellipse method.
4. Measure the second area, move the cursor and press Set to anchor the
start point, and the mark “+” appears. Move the cursor with trackball.
Measurement Results displays the real time measurement value and
calculation result.
5. During measurement, you can press Update to change the start point
and the end point.
6. Roll the trackball and press Set to complete the measurement. You can
measure a maximum of eight group of data. The outcome will be
displayed in the measurement result window.
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