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Chapter 5 Measurements And Calculations
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Vesl. Dist. (Vessel Distance)
Measure the width of a blood vessel and calculate TAMV and Volume Flow.
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 (Stenosis Area)
Measure the area of the inner and outer walls of a blood vessel.
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 x 100
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% StD (Stenosis Distance)
Measure the diameter of a blood vessel.
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 x 100
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