Figure 1b. Coronal three-dimensional time-resolved MR angiograms (4.0/1.65 with 25° flip angle) of the renal arteries in anteroposterior maximum intensity projection images. Differences in SNR were not significant between the two dose groups. (a) First image obtained after power injection of gadobenate dimeglumine 0.05 mmol/kg followed with saline reveals a lower right accessory renal artery (arrow) that was correctly detected and graded (no stenosis) by all four observers. (b) First image obtained after power injection of gadobenate dimeglumine 0.1 mmol/kg followed with saline. No stenosis was detected.