By injecting a contrast liquid into the veins, a(n) can see how the kidneys clear a fluid.

An IVP (intravenous pyelogram) uses contrast dye injected into a vein. The kidneys filter the dye and pass it into the urine, allowing their function and urinary tract to be viewed. A cystogram examines the bladder, cystoscopy uses a scope, and GFR is a measure of kidney filtration rather than an imaging procedure.

AI-written and checked against the verified answer.