Table 11. Image quality analysis within prospectively-ECG triggered scans in a consistently fixed range of late systole to early diastole.

Variables	Female (n=88)	Male (n=98)	P value
Aorta noise (HU), mean ± SD	36.9±10.8	31.5±9.5	<0.001
RCA signal (HU), mean ± SD	446.5±123.3	397.4±120.2	0.007
RCA CNR, mean ± SD	14.6±4.1	15.8±4.3	0.04
RCA SNR, mean ± SD	12.1±3.3	13.0±3.3	0.07
LM signal (HU), mean ± SD	472.4±128.8	413.2±118.6	0.001
LM CNR, mean ± SD	15.3±3.3	15.9±4.3	0.26
LM SNR, mean ± SD	13.2±3.14	13.6±3.3	0.43

RCA, right coronary artery; SD, standard deviation; CNR, contrast-to-noise ratio; SNR, signal-to-noise ratio; LM: left main coronary artery.