Fig. 12
From: MRI assessment of hepatocellular carcinoma after locoregional therapy
Two hepatic focal lesions after old RFA. a T2-WI shows a hypointense signal of the treated focal lesions. b Pre-contrast T1 fat-suppressed image shows the ablated HFLs with their bright signal due to coagulative necrosis. c Subtracted T1-WI arterial phase shows newly developed faint enhancement of the lesions. d DWI shows no true restriction corresponding to the enhancement. e Subtracted T1-WI arterial phase after a 3-month interval shows no enhancement of the lesions. Initial post-treatment assessment by LI-RADS v2018 is LR-TR equivocal that proved to be nonviable after a short-interval follow-up. DWI was consistent with LR-TR nonviable from the start with no restriction initially and on the follow-up (not shown)