title: A new method for studying barium sulphate contrast media in vitro.
mesh_terms: D001466:Barium Sulfate; D003720:Densitometry / Q000379:methods; D006801:Humans; D066298:In Vitro Techniques; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging*
chemical_list: D001466:Barium Sulfate