An evaluation of the radio-opacity of various ingested foreign bodies in the pharynx and esophagus.
D000818:Animals; D001466:Barium Sulfate; D003287:Contrast Media; D004945:Esophagoscopy; D004947:Esophagus / Q000000981:diagnostic imaging*; D005399:Fishes; D005547:Foreign Bodies / Q000175:diagnosis / Q000000981:diagnostic imaging*; D008722:Methods; D010614:Pharynx / Q000000981:diagnostic imaging*; D011859:Radiography
D003287:Contrast Media; D001466:Barium Sulfate