FIGURE 7.  RAS due to atherosclerosis in 75-y-old woman. Baseline renography with ¹²³I-OIH (A) and ACE inhibitor renography (B) show delayed renal parenchymal uptake in right kidney, as compared with baseline (images taken at 1, 6, 11, and 16 min [from left to right] after injection). (C) Angiogram shows narrow stenosis at ostium of right renal artery (arrow). (D) Angiogram performed after angioplasty demonstrates successful dilatation of vessel (arrow). (E) Coronal 3-dimensional CT shows regular-sized reshaped vessel, with presence of stent (arrow). ACEI = ACE inhibitor.