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 5

Results of analyzing different ROI sizes at the same position of a nonstenotic dataset and a dataset with an 80% stenosis. Changes in AUC of ROI I to IV are compared to ROI size 10mm x 10mm and listed as AUC/REF.

Stenotic degree [%]	ROI	10mm x 10mm; AUC/ REF	8mm x 8mm; AUC/ REF	6mm x 6mm; AUC/ REF	4mm x 4mm; AUC/ REF
80	1	1.00	1.07	1.18	1.27
80	2	1.00	1.04	1.06	1.06
80	3	1.00	1.02	1.05	1.12
80	4	1.00	1.04	1.05	1.01
0	1	1.00	1.12	1.25	1.48
0	2	1.00	1.16	1.34	1.48
0	3	1.00	1.18	1.28	1.36
0	4	1.00	1.18	1.33	1.37