title: Renewed interest in gases for contrast roentgenography.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D002245:Carbon Dioxide; D006528:Carcinoma, Hepatocellular / Q000000981:diagnostic imaging; D003287:Contrast Media; D003480:Cushing Syndrome / Q000000981:diagnostic imaging; D004285:Dogs; D006801:Humans; D007275:Injections, Intravenous; D008113:Liver Neoplasms; D009609:Nitrous Oxide; D010490:Pericardial Effusion / Q000000981:diagnostic imaging*; D011012:Pneumomediastinum, Diagnostic; D011859:Radiography; D012188:Retropneumoperitoneum
chemical_list: D003287:Contrast Media; D002245:Carbon Dioxide; D009609:Nitrous Oxide