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Figure 2 RBG
Examples of renal blush grade (RBG). (A) Grade 0: no parenchymal blush/contrast opacification of cortical vessels or inability of contrast clearance from renal parenchyma after initial opacification; (B) grade 1: minimal parenchymal blush/contrast opacification of cortical vessels; (C) grade 2: complete parenchymal blush/contrast opacification of cortical vessels; (D) grade 3: hyperemic parenchymal blush/brisk clearance of contrast from cortical vessels. All assessments made within the first 2 s of initial contrast opacification of the renal artery (frame 60).
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