EXCRETORY PHASE CT UROGRAPHY: MODIFIED TECHNIQUE FOR IMPROVE URINARY COLLECTING SYSTEM DISTENTION AND DECREASE DENSITY OF EXCRETED CONTRAST.
Abstract
Purpose: To determine if oral water with and without combined intravenous saline infusion and body rotation improved imaging of the urinary collecting system on excretory phase multi-detector CT urography.
Materials and Methods: 42 consecutive renal donors underwent 1 6-detector CT urography. The excretory phase imaging was performed 400 seconds after intravenous contrast injection either with conventional supine technique (n=17) or modified technique (n=25; after intravenous injection of 250 ml of 0.9% saline and body rotation). Two radiologists retrospectively reviewed blindly and independently scored, 1) degree of distention of collecting system, 2) degree of opacification. Bladder volume was calculated.
Results: The modified cohort had significantly improved distention scores in the intrarenal segments (p<0.05) and bladder (p<0.005) and larger mean bladder volume (p<0.001) as well as significantly higher mean opacification quality scores in the modified cohort (p<0.005).
Conclusion: A significantly improved excretory-phase CT urogram was obtained by intravenous saline infusion and body rotation.
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