Fig. 6
From: Gastrointestinal perforation: clinical and MDCT clues for identification of aetiology
65-year-old patient with perforated duodenal ulcer. Coronal unenhanced image (modified soft tissue window) following oral contrast administration demonstrates a thickened duodenal wall (*), contrast leaking (black arrow) to the peritoneal spaces and free gas bubbles (arrowheads). Note hyperdensity of perihepatic free fluid (white arrow) compared with the diluted contrast in the rectouterine pouch (open arrow)