Table 4. Quantitative assessment of image quality based on the stents type.

Stent type	keV	CNR	SNR	CT attenuation	Image noise
Missing stent details [8]	65	12.13±9.12	6.26±6.50	272.42±212.08	33.33±25.85
	68	11.37 ±8.43	6.37±6.94	248.58 ±195.50	30.90±24.48
	70	10.44 ±7.59	6.15 ±6.78	232.70 ±183.85	29.90±23.71
	72	9.39±6.74	5.79 ±6.38	217.84 ±172.95	29.27 ±23.08
Conventional CTA [6]		10.38±2.70	12.00±3.15	472.76±29.69	42.96±15.41
ev3 Protege Everflex (self-expandable) [10]	65	14.06±7.01	8.68±8.22	395.17±168.70	44.92±23.87
	68	14.14±6.63	8.22±4.65	359.52±154.19	43.33±23.46
	70	13.21±6.10	7.69±4.30	337.98 ±145.46	43.01±23.35
	72	12.13±5.53	7.09±3.88	317.87±137.36	43.29±43.64
Conventional CTA [5]		7.54±5.34	9.31±6.05	383.13±68.87	52.13±18.19
Abbott Omnilink (balloon mounted) [4]	65	21.12±4.67	18.72±7.38	527.08±80.65	33.32 ±11.17
	68	21.04±4.09	16.87 ±7.13	481.79 ±65.63	32.34±10.94
	70	20.21±3.78	15.57±6.78	454.42±56.66	31.53 ±10.73
	72	18.95±3.71	14.25 ±6.24	428.84±48.29	30.75±10.21
Conventional CTA [3]		7.17±1.10	8.56±1.50	377.60±84.49	47.42±20.62
Cordis genesis (balloon mounted) [19]	65	20.25±17.91	14.13±9.53	463.74±150.95	33.61±14.66
	68	19.87±14.39	13.70±7.92	421.43±136.53	32.32±13.17
	70	17.83±11.91	12.79 ±7.07	396.12±128.06	31.95±12.70
	72	15.78±10.21	12.90 ±9.64	373.43±120.84	31.70 ±13.28
Conventional CTA [17]		10.73±4.12	12.23±4.62	481.51±133.57	46.52±23.68
Cordis SMART (self-expandable) [8]	65	9.99±13.78	6.29±9.91	244.65±226.47	42.32 ±36.80
	68	8.64 ±10.32	6.85±10.90	222.82 ±207.30	37.65 ±33.98
	70	8.21±9.99	6.55±10.32	208.93 ±194.51	36.50±33.04
	72	7.39±9.15	6.10±9.57	195.94 ±182.66	35.80 ±32.14
Conventional CTA [4]		7.35±3.70	8.38±3.91	418.14±154.87	57.91±20.41
Boston Scientific Wallstent (self-expandable) [7]	65	19.68 ±19.31	12.87 ±12.92	409.63±267.01	34.12 ±21.86
	68	18.70 ±17.91	13.20 ±12.98	375.90 ±246.53	30.76±19.54
	70	17.15±16.19	12.92±12.96	355.52±234.33	30.58±19.73
	72	15.50±14.75	12.59±12.74	336.57±223.10	30.56 ±20.23
Conventional CTA [4]		4.60±1.79	5.45±1.95	336.94±107.18	50.02±21.70