Radionuclear imaging of micturition (RNIM) (Nuclear Uroflowmetry, Voiding Nuclear Cystogram) measures bladder volumes, bladder emptying times, and urinary flow rates. These data help to differentiate normal subjects from those with obstructive uropathy or neuromuscular failure and to quantify the deficit. We discuss the physiological considerations of importance to physicians ordering and interpreting this convenient and noninvasive diagnostic procedure.
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