Table 1. Measurements of coronary lumen stenosis in synchrotron radiation CT images of coronary artery model 1 acquired with different beam energies and slice thicknesses.

2D and 3D VIE	Beam energies	Left main stem (degree of lumen stenosis %)					Left anterior descending (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	99.1±0.004	98.8±0.003	99.1±0.004	100±0.000		47.4±0.007	47.3±0.001	48.6±0.022	55.1±0.036
	40 keV	98.7±0.002	98.7±0.006	98.8±0.006	100±0.000		47.5±0.017	46.5±0.014	47.3±0.014	57.7±0.026
	50 keV	98.5±0.001	98.3±0.012	98.6±0.008	100±0.000		45.9±0.011	45.1±0.015	44.7±0.021	56.7±0.029
3D VIE images	30 keV	99.3±0.003	97.7±0.012	98.3±0.002	100±0.000		48.2±0.006	46.1±0.020	45.9±0.013	70.1±0.006
	40 keV	98.3±0.005	96.8±0.024	97.4±0.007	100±0.000		46.9±0.011	47.1±0.011	44.2±0.023	71.3±0.037
	50 keV	98.3±0.000	97.9±0.011	99.2±0.021	99.4±0.010		46.4±0.032	44.1±0.002	48.2±0.044	72.9±0.019

SD, standard deviation; VIE, virtual intravascular endoscopy.