For Barium Enema (Also Called Lower Gi, Or Gastrointestinal, Series.) we have a term and definition in Health.

A procedure that examines the rectum, large intestine, and lower part of the small intestine. A fluid called barium (a metallic, chemical, chalky, liquid used to coat the inside of organs so that they will show up on an x-ray) is given into the rectum as an enema.
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