[Significance of pneumoperitoneum and a method for double-contrasting in roentgenodiagnosis of gastric cancer].
D000005:Abdomen; D006801:Humans; D007327:Insufflation; D011027:Pneumoperitoneum; D011028:Pneumoperitoneum, Artificial; D011859:Radiography; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging*
PNEUMOPERITONEUM, ARTIFICIAL; STOMACH NEOPLASMS/radiography