Fig. 7

Contrast-enhanced ultrasound (CEUS) Liver Imaging Reporting and Data System (LI-RADS). CEUS examination obtained in a 35-year-old male patient with HCC and categorized into LI-RADS 5. a A hypoechoic lesion was detected by conventional ultrasound, and CEUS showed b arterial phase homogeneous hyperenhancement, c portal phase isoenhancement and d mild and late washout in the late phase. CEUS examination obtained in a 32-year-old female patient with HCC and categorized into LI-RADS M. e A slightly hypoechoic lesion was detected by conventional ultrasound, and CEUS showed f arterial phase homogeneous hyperenhancement followed by g early washout at 30 s and h mild and late washout in the late phase