Double-contrast barium enema
（重定向自Double contrast barium enema）
![Human intestinal tract, as imaged via double-contrast barium enema](/Images/godic/202501/09/Human_intestinal_tract,_as_imaged_via_double-contrast_barium_enema5149.jpg")
A double-contrast barium enema is a procedure in which x-rays of the colon and rectum are taken after a liquid containing barium is put into the rectum. Barium is a silver-white metallic compound that outlines the colon and rectum on an x-ray and helps show abnormalities. Air is put into the rectum and colon to further enhance the x-ray.