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FIG 1. Graphs show summary of 500 randomly selected measurements from the simulation run. In A, differences between 2 simulated measurements are plotted versus mean value of s, the fractional residual lumen. B displays absolute difference versus mean for the same data. The line in B represents the linear regression fit. Although not strictly valid because the standard deviation is derived from a half-normal distribution, 95% limits of agreement (21) are indicated in A for reference. These plots illustrate the range of error as well as the mild dependence of standard deviation on stenosis grade in the simulation. The standard deviation tends to decrease for higher percentage diameter stenosis.
