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Operation Manual
Stenosis Measurement
You can measure the stenosis of each blood vessel system by measuring and calculating an area or
distance.
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% StA
Measure the area of the inner and outer walls of a blood vessel. StA stands for Stenosis Area.
1. Select the %StA menu and the rst cursor will appear in 2D Mode.
2. Measure the area of the vessel’s outer wall using the Circ/Area measurement method.
3. When the second cursor appears, measure the area of the vessel’s inner wall under stenosis.
%Stenosis Area. = (Outer Area – Inner Area) / Outer Area × 100
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% StD
Measure the diameter of a blood vessel. StD stands for Stenosis Distance.
1. Select the %StD menu and the rst cursor will appear in 2D Mode.
2. Measure the total diameter of a blood vessel using the Distance measurement method.
3. When the second cursor appears, measure the diameter of the vessel’s inner wall under stenosis.
%Stenosis Dist. = (Outer Distance – Inner Distance) / Outer Distance × 100
Heart Rate Measurement
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HR (Heart Rate)
You can calculate heart rates for a certain period of time.
1. Select HR in the Measurement menu. A bar appears allowing you to specify a measurement area.
2. Specify the measurement range.
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Place the bar at a desired position with the Trackball, and press the Set button.
3. The system measures the heart rate within the specied range automatically. The measurement
results are displayed on the screen.
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