Fig. 4

Female patient 49 years old with HCC at segment VII underwent RFA. MRI study was done after 13 weeks after ablation and revealed low ADC value and diffusion restriction in a viable lesion. The lesion showed an intermediate signal at T1WI (a), an isointense signal at T2WI (b); at DCE series showed arterial phase hyperenhancement (c) and gradual washout at portal phase (d) and delayed phase (e), restricted diffusion seen at DWI at b value 500 (f) and 800 (g), with corresponding low signal at ADC series (H) ADC value = 0.92 × 10⁻³ mm²/s