Mindelzun R E, McCort J J
Gastrointest Radiol. 1986;11(3):283-5. doi: 10.1007/BF02035091.
Free air within the peritoneal cavity can be recognized on supine abdominal films by identification of the median subphrenic space. We have termed this the "cupola sign." In a review of 100 patients with pneumoperitoneum, this sign was seen in 6 patients. In 3 instances it was the only manifestation of a pneumoperitoneum and in 3 instances it was seen in association with air below the right and left diaphragmatic leaves.
通过识别膈下中间间隙，可在仰卧位腹部平片上发现腹腔内的游离气体。我们将此称为“穹窿征”。在对100例气腹患者的回顾中，6例患者出现了此征象。其中3例是气腹的唯一表现，另外3例则与左右膈叶下方的气体同时出现。
