Reliability and Accuracy of Peri-Interventional Stenosis Grading in Peripheral Artery Disease Using Color-Coded Quantitative Fluoroscopy: A Phantom Study Comparing a Clinical and Scientific Postprocessing Software

Table 3

Results of the ANOVA analysis ROIs I to IV analyzed with ImageJ. Time-to-peak for ROI I to IV and all stenosis grades were calculated. Arithmetic mean, standard deviations, and p values (significant values are marked with an asterisk) of three repeated measurements are listed.

ROI	No stenosis [s]	40 % stenosis [s]	60 % stenosis [s]	80 % stenosis [s]	p-value
I	0.65 (±0.39)	0.39 (±0.20)	0.52 (±0.28)	0.51(±0.25)	0.745
II	0.66 (±0.37)	0.35 (±0.27)	0.56 (±0.29)	0.73 (±0.26)	0.495
III	0.66 (±0.37)	0.36 (±0.32)	0.85 (±0.26)	0.87 (±0.68)	0.178
IV	0.69 (±0.42)	0.33 (±0.25)	0.93 (±0.20)	0.84 (±0.05)	0.105