Sensitivity in detecting significant stenosis ( > 50 % ) was 72.3 % for gadoterate meglumine versus 70.6 % for gadobutrol , whereas specificity ( 92.6 % vs 92.3 % ) , diagnostic confidence ( 87.0 % vs 86.0 % ) , signal-to-noise ratio ( 165.5 vs 161.0 ) , and contrast-to-noise ratio ( 159.5 vs 155.3 ) did not differ statistically significantly between the two groups .