Table 3. Measurements of coronary lumen stenosis in synchrotron radiation CT images of coronary artery model 3 acquired with different beam energies and slice thicknesses.

2D and 3D VIE	Beam energies	Left circumflex-proximal segment (degree of lumen stenosis %)					Left circumflex-mid segment (degree of lumen stenosis %)
		0.095 mm (mean ± SD)	0.208 mm (mean ± SD)	0.302 mm (mean ± SD)	0.491 mm (mean ± SD)		0.095 mm (mean ± SD)	0.208 mm (mean ± SD)	0.302 mm (mean ± SD)	0.491 mm (mean ± SD)
2D axial images	30 keV	99.2±0.005	97.2±0.009	97.8±0.005	100±0.000		71.5±0.011	75.2±0.017	74.7±0.021	85.1±0.078
	40 keV	99.0±0.003	98.9±0.005	97.8±0.001	96.8±0.018		71.2±0.011	75.6±0.015	79.7±0.014	84.2±0.009
	50 keV	98.9±0.003	98.2±0.001	97.3±0.006	97.3±0.011		70.7±0.013	74.7±0.013	73.7±0.039	87.1±0.011
3D VIE images	30 keV	99.2±0.006	96.6±0.028	96.3±0.018	97.9±0.003		73.6±0.007	78.7±0.007	74.1±0.048	89.5±0.012
	40 keV	98.2±0.002	96.9±0.013	96.9±0.018	96.2±0.002		75.9±0.042	74.2±0.011	78.5±0.009	87.5±0.007
	50 keV	99.7±0.000	98.5±0.008	98.2±0.001	97.5±0.016		71.5±0.030	75.1±0.022	74.3±0.014	88.4±0.055

SD, standard deviation; VIE, virtual intravascular endoscopy.