The kidneys are a pair of bean-shaped organs located toward the back of the abdominal cavity, just above the waist. They remove waste products from the blood and produce urine. The ureters are thin tubes that carry the urine from the kidneys to the bladder.
A renal ultrasound is a safe and painless test that uses sound waves to make images of the kidneys, ureters, and bladder.
Renal ultrasound tests can show: