Fig. 4From: Role of DWI in evaluation of HCC after radiofrequency ablation compared to dynamic MRI using MRI (3 T)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/sBack to article page