[reno- + -gram]
A record of the rate of removal of an intravenously injected dose of a radioactive tracer from the blood by the kidneys.
A method of testing the kidneys for evidence of pyelonephritis, e.g., in children suspected of having kidney damage resulting from vesicoureteral reflux. A small dose of dimercaptosuccinic acid (DMSA) linked to radioactive technetium (technetium-99m) is injected intravenously and allowed to circulate to the kidneys. Several hours later, uptake of the tracer by the kidneys is measured with a gamma camera.
A method for measuring blood flow to the kidneys and urinary excretion by the kidneys. A small dose of diethylenetriamine pentacetic acid (DTPA) linked to radioactive technetium (technetium-99m) is injected intravenously. Images of the kidneys are taken without delay. The tracer's circulation to the kidneys and its excretion by them can provide information about diseases such as renal artery stenosis, kidney transplant rejection, and ureteral or urethral obstruction.