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Upper gastrointestinal series
Pronunciation
Definition 1
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 GI series. (NCI Dictionary)
Definition 2
An x-ray examination of the esophagus, stomach and first part of the small intestine following coating with barium solution via ingestion. (NCI Thesaurus)
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