The Nonvisualized Kidney: The Value of Nephrotomography

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Abstract
High-dose nephrotomography, approximately 0.5 g 1/lb. is of value in examination of the urinary tract. In a nonvisualized kidney, this technique will frequently produce a diagnostic examination. Retrograde pyelogram may fail when obstruction prevents filling of the pelvocalyceal system, and the possibility of infection after the instrumentation of a stagnant system often mitigates against a retrograde pyelogram. Thus, after nonvisualization with a routine or infusion dose intravenous urogram, the indicated examination is the nephrotomogram, a study that will frequently delineate the remaining renal substance. Nephrotomography is a less hazardous examination than angiography and frequently gives more information than does arteriography, since the nonvisualized kidney commonly has a poor vascular supply.

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