Technology
Barium swallows coat intestines for clear x rays
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Soft tissues like your esophagus are completely invisible to standard X-rays. To diagnose a stricture, doctors force you to drink a thick, chalky milkshake loaded with barium sulfate. This heavy metal permanently refuses to absorb into your bloodstream, completely lining your digestive tract in a dense, radioactive-blocking paste so your guts temporarily glow on the monitor.
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