Gastrointestinal Series
Gastrointestinal Series : Gastrointestinal series, or GI series, is an investigation of the gastrointestinal tract in which a series of X-ray photographs are taken. This is made possible when the patient swallows a tasteless solution of barium. X rays are taken as the radiopaque barium passes through the esophagus, stomach, and intestines. The barium solution shows the outline of these hollow organs. The barium is usually given to the patient early in the morning when the stomach is empty. A lower GI series, or barium enema, is used to visualize the large intestine, or colon. In this case, however, the barium solution is given as an enema, rather than being swallowed
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