Is a fluoroscopic examination of the esophagus, stomach, and duodenum, involving oral administration of barium sulfate as a contrast medium?
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- Barium swallow X-ray examinations are used to study the pharynx and esophagus.
- Barium meal examinations are used to study the lower esophagus, stomach and duodenum.
- Barium follow through examinations are used to study the small intestine.
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