title: Optimal double-contrast visualization of the posteriorly directed duodenal bulb.
abstract: The posteriorly directed duodenal bulb can be difficult to demonstrate because of the overlapping gastric antrum. A technique is described for displacing the antrum from the bulb while simultaneously distending the barium-coated duodenal bulb with air.
mesh_terms: D004386:Duodenum / Q000000981:diagnostic imaging*; D006801:Humans; D011859:Radiography / Q000379:methods*