Barium XRays (Upper and Lower GI) | Johns Hopkins Medicine
Barium is a dry, white, chalky powder that is mixed with water to make barium liquid. Barium is an Xray absorber and appears white on Xray film. When instilled into the GI tract, barium coats the inside wall of the esophagus, stomach, large intestine, and/or small intestine so that the inside wall lining, size, shape, contour, and patency ...
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