Answer

CT Chronic Renal Failure Persistent Nephrograms
CT in the axial plane through the kidneys shows bilateral small irregular kidneys, left smaller than right with persistent nephrograms a day after a cardiac catheterization. While the larger right kidney does show some excretion into the calyces, there is no identifiable excretory phase in the left kidney. Neither the aorta nor the IVC has contrast and there is vicarious excretion of contrast in the gallbladder which is further evidence of chronic renal failure.
Ashley Davidoff MD TheCommonVein.net 130983c