Table 2.

Stent characteristics, quantitative analysis and image quality

	I-370 (n = 71)	I-320 (n = 85)	p-value
Stent diameter, mm	3.31 ± 0.53	3.34 ± 0.52	0.78
Stent diameter ≥3 mm, n (%)	62 (87)	76 (89)	0.88
OWT, mm	0.63 ± 0.22	0.59 ± 0.23	0.19
Stent location			0.65
LAD, n (%)	36 (51)	38 (44)
CX, n (%)	17 (24)	20 (24)
RCA, n (%)	18 (25)	27 (32)
CCO difference	0.14 ± 0.17	0.17 ± 0.22	0.33
Stent lumen quantitative analysis
Mean attenuation, HU	523.7 ± 140	508.8 ± 149.5	0.56
Myocardial attenuation, HU	73.5 ± 8	70.6 ± 6.5	0.014
Noise, HU	41 ± 18	49.7 ± 20	0.002
SNR	16.9 ± 7.9	14.4 ± 10.8	0.006
CNR	14.2 ± 6.9	12.3 ± 9.4	0.006
LAI ratio	0.39 ± 0.42	0.48 ± 0.44	0.08
Reference vessel
Aortic root, HU	387.7 ± 53.8	343.2 ± 68.5	<0.001
Pre-stent, HU	384.1 ± 63.6	348.1 ± 61.4	<0.001
Pre-stent <400, HU	48 (67)	48 (76)	0.29
Post-stent, HU	329.1 ± 90.6	291.3 ± 103.1	0.001
Stent lumen image quality
Likert ≥ 4, n (%)	62 (87)	77 (90)	0.71
Likert	4.5 ± 0.8	4.5 ± 0.7	0.50

CCO, corrected coronary opacification; CNR, contrast-to-noise ratio; CX, left circumflex artery; LAD, left anterior descending coronary artery; LAI, lumen attenuation increase; RCA, right coronary artery; SNR, signal-to-noise ratio.

Values are given as mean ± SD or absolute numbers and percentages.

LAD, CX and RCA branches were attributed to the main artery.