Fully Automated Lumen Segmentation Method for Intracoronary Optical Coherence Tomography

Table 4

Statistical comparison of parameters between our methodology and another commercially available system 2.

	Our method (first measure) mean (CI)	System 2 (second measure) mean (CI)	Our method (first measure) median (IQR)	System 2 (second measure) median (IQR)	Difference	Relative difference	ICC (95% CI)	ICC value
Lumen area	5.99 (5.83–6.14)	5.76 (5.61–5.92)	6.45 (4.72–7.67)	6.13 (3.98–7.48)	0.22 (0.18–0.27)	−4.23% (−4.88% to −3.57%)	0.95 (0.93–0.97)	<0.0001
Mean lumen diameter	2.72 (2.68–2.76)	2.66 (2.61–2.70)	2.88 (2.41–3.13)	2.79 (2.25–3.09)	0.06 (0.05–0.07)	−2.42% (−2.85% to −1.99%)	0.94 (0.92–0.96)	<0.0001
Minimal lumen diameter	2.52 (2.48–2.56)	2.42 (2.37–2.46)	2.64 (2.18–2.96)	2.56 (2.01–2.91)	0.10 (0.09–0.12)	−4.96% (−5.53% to −4.39%)	0.95 (0.85–0.97)	<0.0001
Maximal lumen diameter	2.91 (2.87–2.96)	2.87 (2.83–2.91)	3.07 (2.54–3.30)	3.00 (2.50–3.26)	0.04 (0.02–0.06)	−1.11% (−1.58% to −0.63%)	0.89 (0.88–0.91)	<0.0001