A doctor might order this test to investigate symptoms relating to the blood vessels in the abdomen, gallbladder, intestines, kidneys, liver, pancreas, or spleen. An ultrasound can assess the cause of stomach pain or bloating, as well as check for liver disease, kidney stones, tumors, or other abdominal conditions. An abdominal ultrasound might also be ordered for a patient at risk of an abdominal aortic aneurysm.