Barium swallow

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A barium swallow is a medical imaging procedure used to examine a person's upper GI (GastroIntestinal) tract (esophagus, stomach, and small intestine).

The person drinks a suspension of barium sulphate. X-rays are taken after the person has swallowed this. The suspension appears white on the x-rays, and outlines the internal lining of the upper GI tract.

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