Source:http://linkedlifedata.com/resource/umls/id/C1318509
NCI: A series of x-ray pictures of the esophagus taken after a patient drinks a liquid containing barium sulfate (a form of the silver-white metallic element barium). The barium sulfate coats and outlines the inner wall of the esophagus so that it can be seen on the x-ray pictures.,NCI: The process of obtaining contrast esophagrams.