The visible gallbladder: a plain film sign of pneumoperitoneum.
Radin
R
R
Department of Radiology, University of Southern California School of Medicine, Los Angeles County--USC Medical Center 90033, USA.
Van Allan
R J
RJ
Rosen
R S
RS
D000368:Aged; D002765:Cholecystography; D003108:Colonic Diseases / Q000150:complications / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007416:Intestinal Perforation / Q000150:complications / Q000000981:diagnostic imaging; D008875:Middle Aged; D011027:Pneumoperitoneum / Q000000981:diagnostic imaging*