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Upper GI Series

Glossary

upper GI series

A series of x-ray pictures of the esophagus, stomach, and duodenum (the first part of the small intestine). The x-ray pictures are taken after the patient drinks a liquid containing barium sulfate (a form of the silver-white metallic element barium). The barium sulfate coats and outlines the inner walls of the upper gastrointestinal tract so that they can be seen on the x-ray pictures. Also called upper gastrointestinal series.

Last updated: 2014-05-21

Source: The National Cancer Institute's Dictionary of Cancer Terms (http://www.cancer.gov/dictionary)