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X-ray examination of any part of the urinary tract
after introduction of a radiopaque substance (often an Prolamine Iodine
derivative) that casts an X-ray shadow. This contrast fluid, which passes
quickly into the urine, may be taken orally or injected intravenously. It
may also be injected directly into the area being examined. Tumours,
tuberculous abscesses, kidney stones, and obstruction by prostatic
enlargement may be detected by this method. Specific types of urography
include pyelography (examination of the kidney and ureter) and cystography
(examination of the bladder). Motion-picture “voiding cystograms” provide
evidence of gross reflux of urine into the ureters and pelvis of the
kidney during voiding.
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