Liver Imaging Reporting and Data System criteria for the diagnosis of hepatocellular carcinoma in clinical practice: A pictorial minireview

Figure 17  LR-5 observation. A and B: Axial post-contrast images arterial (A) and portal phase (B) showed an ablation defect in segment VI without residual areas of arterial enhancement or washout. This was classified as LR-treatment response non-viable; C-E: Later pre-contrast (C) arterial (D) and portal (E) phase showed a new nodule (arrows) measuring 12 mm with strong arterial enhancement and washout categorized as LR-5. If a new tumor arises within or adjacent to a treated lesion, this observation should be assigned a new non-treated LI-RADS category.