Ну, я вот тут почитала в eMedicine...
In the setting of flank pain, fever, and pyuria, pyelonephritis can be diagnosed and treated without immediate imaging. Failure to respond to therapy within the usual 48 hours should prompt a renal ultrasound to look for infection associated with significant obstructive uropathy that may require placement of a percutaneous nephrostomy. Renal and ureteral calculi are imaged best with a noncontrast spiral CT scan.
А какой ответ правильный именно в этой задачке?
