Barium enema

A lower gastrointestinal series, also called a barium enema, is a medical procedure used to examine and diagnose problems with the human colon (large intestine). X-ray pictures are taken while barium sulfate fills the colon via the rectum.
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A barium enema, also known as a lower GI exam, is a test that uses x-ray examination to view the large intestine. [more]Barium enema - Community and Resources

Noun
1. contrast medium is injected into the rectum and x-rays are taken to search for lesions
(hypernym) enema, clyster

A series of x-rays of the lower intestine. The x-rays are taken after the patient is given an enema with a white, chalky solution that contains barium. The barium outlines the intestines on the x-rays.

A procedure in which a liquid with barium in it is put into the rectum and colon by way of the anus. Barium is a silver-white metallic compound that helps to show the image of the lower gastrointestinal tract on an x-ray.