Table 4. Percentiles of the distributions of number of struts obtained with the automatic and manual segmentation methods, and total and radial distances between the centroid of each automatically segmented strut and the nearest manually identified strut.

	25th percentile	50th percentile	75th percentile
Number of struts
Auto	11	13	15
R1	11	14	15
R2	10	12	15
Total distance between struts [μm]
Auto vs. R1	18.38	29.07	41.11
Auto vs. R2	18.38	29.07	46.87
R1 vs. R2	13.00	13.00	26.00
Radial distance between struts [μm]
Auto vs. R1	4.58	9.64	15.73
Auto vs. R2	5.31	11.30	18.37
R1 vs. R2	2.61	9.58	14.37

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