Rigler sign

  title={Rigler sign},
  author={Venkatraman Indiran and Vadivalagia Nambi Sivakumar},
  journal={Abdominal Radiology},
Rigler sign, also known as bas-relief or double wall sign, is named after the American radiologist Leo George Rigler, who first described it in 1941 [1]. It denotes the presence of air along the luminal and peritoneal aspect of the bowel wall on supine abdominal radiographs (Fig. 1). This sign is present when there is at least a moderate pneumoperitoneum [1… CONTINUE READING