title: New device facilitating retroperitoneal pneumography.
mesh_terms: D000792:Angiography; D001027:Aortography; D002245:Carbon Dioxide; D006801:Humans; D008722:Methods; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging; D012188:Retropneumoperitoneum / Q000295:instrumentation*
chemical_list: D002245:Carbon Dioxide