Fig. 6

A 36-year-old male, known case of hydatid disease. Triphasic CT study revealed left lobe segment IV cystic non-enhancing lesion with marginal calcification. a NEUS revealed average-sized liver showing left lobe segment IV heterogeneous cystic lesion measuring about 4 cm. b–d CEUS real-time examination during arterial phase, portal phase, and late phase showed persistent non-enhancement