Fully Automated Lumen Segmentation Method for Intracoronary Optical Coherence Tomography

Table 3

Statistical comparison of parameters between our methodology and commercially available system 1.

	Our method (first measure) mean (CI)	System 1 (second measure) mean (CI)	Our method (first measure) median (IQR)	System 1 (second measure) median (IQR)	Difference	Relative difference	ICC (95% CI)	ICC value
Lumen area	5.99 (5.83–6.14)	6.04 (5.90–6.19)	6.45 (4.72–7.67)	6.50 (5.01–7.56)	−0.06 (−0.08–−0.03)	1.67% (1.25%–2.10%)	0.99 (0.98–0.99)	<0.0001
Mean lumen diameter	2.72 (2.68–2.76)	2.72 (2.68–2.76)	2.88 (2.41–3.13)	2.87 (2.52–3.10)	−0.00 (−0.01–0.00)	0.34% (0.06%–0.63%)	0.98 (0.97–0.98)	<0.0001
Minimal lumen diameter	2.52 (2.48–2.56)	2.52 (2.48–2.56)	2.64 (2.18–2.96)	2.52 (2.48–2.56)	0.00 (−0.01–0.01)	0.16% (−0.16%–0.49%)	0.98 (0.97–0.98)	<0.0001
Maximal lumen diameter	2.91 (2.87–2.96)	2.93 (2.89–2.97)	3.07 (2.54–3.30)	3.08 (2.66–3.28)	−0.02 (−0.03–−0.00)	0.82% (0.43%–1.21%)	0.94 (0.93–0.95)	<0.0001