Fig. 3From: Effect of different injection rates and doses of contrast medium on the image quality of computed tomographic angiography in African grey parrots (Psittacus erithacus)Boxplot of SNR and CNR. A decrease of the contrast-medium dose leads to a gradual improvement in SNR and CNR. However, SNR and CNR were not affected by the three injection rates we tested. Statistical outliers that are > 1.5-times the interquartile range are represented by × Back to article page