When is CT scan superior to ultrasound for evaluation of kidney disease?
• For evaluation of an indeterminate mass on US or a solid mass when neoplasm is suspected
• CT can define the extent of a neoplasm, evaluate for lymph node involvement, give a more comprehensive view of the perirenal, pararenal spaces, and Gerota fascia, evaluate vasculature (renal vein/inferior vena cava involvement), and stage neoplasms.
• CT is the imaging method of choice in the evaluation of suspected kidney trauma.
• CT provides information on the retroperitoneum and adrenal glands.
• Complications of obstruction, such as infection, calyceal rupture, and kidney cortical atrophy, are readily seen.
