Fully Automated Lumen Segmentation Method for Intracoronary Optical Coherence Tomography

Table 2

Statistical comparison of the parameters between our methodology and manual analyses by analyst (ground truth).

	Our method (first measure) mean (CI)	Ground truth (second measure) mean (CI)	Our method (first measure) median (IQR)	Ground truth (second measure) median (IQR)	Difference	Relative difference	ICC (95% CI)	ICC value
Lumen area	5.99 (5.83–6.14)	5.89 (5.74–6.04)	6.45 (4.72–7.67)	6.29 (4.67–7.50)	0.10 (0.06–0.13)	−1.12% (−1.55% to −0.68%)	0.97 (0.97–0.98)	<0.0001
Mean lumen diameter	2.72 (2.68–2.76)	2.68 (2.64–2.72)	2.88 (2.41–3.13)	2.82 (2.43–3.09)	0.03 (0.02–0.04)	−1.15% (−1.48% to −0.83%)	0.96 (0.95–0.97)	<0.0001
Minimal lumen diameter	2.52 (2.48–2.56)	2.49 (2.45–2.53)	2.64 (2.18–2.96)	2.61 (2.10–2.93)	0.03 (0.02–0.03)	−1.11% (−1.44% to −0.78%)	0.98 (0.98–0.98)	<0.0001
Maximal lumen diameter	2.91 (2.87–2.96)	2.88 (2.84–2.92)	3.07 (2.54–3.30)	3.01 (2.58–3.25)	0.04 (0.02–0.05)	−0.81% (−1.23% to −0.39%)	0.91 (0.89–0.92)	<0.0001