Low-radiation and high image quality coronary computed tomography angiography in “real-world” unselected patients

Table 1 Patient characteristics

Parameter		n (%)
Number of patients		543
Age (yr)		56 ± 11
Gender		Male/Female (33%/67%)
Mean weight (kg)		81 ± 181
Mean heart rate (bpm)		70.3 ± 11.4
Oral Beta-blocker		204 (38)
IV Beta-blocker		255 (47)
Heart rate during scan (bpm)	< 60 bpm	349 (64)
	60-65 bpm	112 (21)
	65-75 bpm	55 (10)
	> 75 bpm	18 (3)
	Not recorded	11 (2)

¹Weight data only available for 32% of the patients.

Table 2 Characteristics of patients with image quality scores of 1 + 2 vs 3 + 4

	Image quality score 1 + 2	Image quality Score 3 + 4	P value
Female patient	12/30 (63%)	216/391 (67%)	P = 0.1068
Mean age ± SD (years)	57.5 ± 10.5	55.5 ± 10.6	P = 0.2979
No. of patients with	22 (69%)	457 (91%)	P < 0.0001
heart rate ≤ 65 bpm
No. of patients with	10 (31%)	43 (9%)	P < 0.0001
heart rate > 65 bpm
Effective dose ± SD (mSv)	1.98 ± 1.69	1.24 ± 1.41	P = 0.0041