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P3V Veterinary Digital Ultrasonic Diagnostic Imaging System User Manual
- 68 -
Ratio
To determine the ratio, take two measurements: A and B. The system
calculates the ratio: A/B or B/A.
To measure ratio:
1. Press Measure to activate measurement function.
2. Roll the trackball to highlight Ratio, press Set to activate a
measurement cursor on the screen.
3. Measure the first distance A with the distance measurement method.
4. Measure the second distance B, 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 Change once to change the
settled point and the active point; if you press Change a second time,
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 four groups of data. The outcome
will be displayed in the measurement result window.
8. Press Measure to finish and exit.
Dist11
Dist12
Ratio1
Figure 6-9 Ratio Measurement and the Results
% Stenosis
Distance stenosis
To determine the distance stenosis, take two distance measurements: A
and B. The system calculates the stenosis: (A-B)/A * 100%.

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