Renal protocol with coronal contrast-enhanced MRA sequence (3D GRE sequence) instead of the soft-tissue sequence illustrated in Fig. 7.1. a, b MRA images were acquired 15 s (a) and 1 min (b) after IV contrast injection. c MIP reconstruction of a to generate an arteriogram. d MIP reconstruction of a sequence acquired 10 min after contrast injection to generate an excretory MRU.
This variant of the renal protocol yields postcontrast images of the renal parenchyma, images for evaluation of renal vessels, and images of the renal collecting systems and ureters for evaluation of urinary outflow