title: The "inverted V": a new sign of pneumoperitoneum.
mesh_terms: D006801:Humans; D008022:Ligaments / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011027:Pneumoperitoneum / Q000000981:diagnostic imaging*; D011859:Radiography; D014472:Umbilicus / Q000000981:diagnostic imaging