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 4

Results of the ANOVA analysis ROIs I to IV assessed with iFlow. 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	0.95 (±0.20)	0.71 (±0.08)	0.75 (±0.08)	0.79 (±0.19)	0.308
II	1.30 (±0.14)	0.69 (±0.27)	0.92 (±0.07)	0.89 (±0.04)	0.011
III	1.30 (±0.14)	0.69 (±0.27)	1.09 (±0.12)	1.20 (±0.35)	0.010
IV	1.58 (±0.19)	0.99 (±0.55)	1.27 (±0.27)	1.29 (±0.07)	0.263