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Section Type: RESULTS

Text: Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) in the proximal right coronary artery (RCA) and left main coronary artery (LMA) were all lower in 80-kV than 120-kV images (SNR in the proximal RCA : 16. 5 1. 8 vs. 19. 4 2. 8 ; SNR in the LMA : 16. 3 2. 0 vs. 19. 6 2. 7 ; CNR in the proximal RCA : 19. 4 2. 3 vs. 22. 9 3. 0 ; CNR in the LMA : 18. 8 2. 4 vs. 22. 7 2. 9 ; all p < 0. 0001).