the system interchanges the numerator and denominator.
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 ratio 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.
Distance stenosis
To determine the distance stenosis, perform two distance measurements:
A and B. The system calculates the stenosis: (A-B)/A * 100%.
To measure distance stenosis:
1. Press Caliper to activate generic measurement function.
2. Roll the trackball to highlight % Stenosis, and select Distance, and
then press Set to activate a measurement cursor on the screen.
3. Measure the first distance with the distance measurement method.
4. Measure the second distance, 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; if you press Update again, the system interchanges
the numerator and denominator.
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