Table 2. Percentiles of the distributions of lumen areas and distance between the lumen contours obtained with the automatic and manual segmentation methods.

	25th percentile	50th percentile	75th percentile
Lumen area [mm2]
Auto	5.836	8.608	9.078
R1	5.895	8.542	9.032
R2	5.875	8.546	9.074
Lumen contours distance [μm]
Auto vs. R1	0.0	13.0	26.0
Auto vs. R2	13.0	13.0	39.0
R1 vs. R2	0.0	13.0	26.0

Auto—automatic detection algorithm; R1 –image reader 1; R2 –image reader 2