Representative MR renography images of the right kidney of a 65-year-old female patient with normal kidney function showing progressive enhancement of kidney tissue (injected dose 4 mL of Gd-DTPA at 2 mL/s; 3D FLASH, TR/TE/FA=2.84/1.05/12°, voxel volume 1.7×1.7×2.5 mm3): a) unenhanced, b) maximum cortical enhancement, c) maximum medullary enhancement, d) collecting system enhancement.