CT multiphasic study protocol in patient with abdominal trauma for suspected renal trauma includes an unenhanced scan without contrast, an initial arterial phase with a scanning delay of 20-30 s to identify vascular damage, followed by a nephrographic phase at 70-80 s to identify parenchymal lesions and a late phase at 3 minutes to detect lesions of the urinary tract.
Cortical-medullary lacerations extending to the collecting system. Injury to the calyceal system with postcontrast CT images of urinary extravasation in the perirenal space.