a noninvasive (the skin is not pierced) procedure used to assess the organs and structures within the abdomen, such as the liver, gallbladder, pancreas, bile ducts, spleen, and abdominal aorta
A non-invasive test that uses high-frequency sound waves to create a picture of the internal organs of the abdomen including the liver, gallbladder, spleen and pancreas. The blood vessels to some of these organs can also be evaluated using this test. Source: Medline Plus Medical Encyclopedia