title: Differentiating colonic polyps from air bubbles on barium enema: the "carpenter's level sign".
authors.affiliation: Department of Radiology, University of Tennessee, Memphis Regional Medical Center 38163.
authors.forename: J P
authors.initials: JP
authors.lastname: Mulloy
authors.forename: R L
authors.initials: RL
authors.lastname: Scott
mesh_terms: D000388:Air; D001466:Barium Sulfate; D003106:Colon / Q000000981:diagnostic imaging; D003111:Colonic Polyps / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D004733:Enema; D006801:Humans; D008961:Models, Structural; D011859:Radiography
chemical_list: D001466:Barium Sulfate