Fig. 2From: 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 image noise. As the doses of the contrast medium decrease, image noise also gradually decreases. However, with the three injection rates we tested, image noise remained similar. Statistical outliers that are > 1.5-times the interquartile range are represented by × Back to article page