Fig. 1From: Accuracy of abdominal ultrasound for the diagnosis of pneumoperitoneum in patients with acute abdominal pain: a pilot study a Normal peritoneal stripe (white arrow) in a patient without pneumoperitoneum in right hypochondrium scan with linear probe. b Normal air within the lumen of the gastrointestinal tract, recognizable by its association with bowel (white arrow) in a patient without pneumoperitoneum in right hypochondrium scan with convex probeBack to article page