Fig. 13
From: Complications of hepatic echinococcosis: multimodality imaging approach
A 66-year-old woman with infected hydatid cyst. Axial T2-weighted MR image demonstrates an air-fluid level (arrow) within a calcified hydatid cyst, but lack of frank cysto-biliary communication. This finding suggests superinfection of a ruptured hydatid cyst that was later proved at surgery