Barium swallows.
D000818:Animals; D001464:Barium; D001466:Barium Sulfate; D041981:Gastrointestinal Tract / Q000000981:diagnostic imaging*; D011859:Radiography; D046388:Swallows
D001464:Barium; D001466:Barium Sulfate
BARIUM SULFATE; GASTROINTESTINAL SYSTEM/radiography