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Axial CT in late arterial phase obtained (a) pretreatment: image shows nonrim arterial phase hyperenhancement (APHE) of a 2-cm observation in segment VII (arrow). b 6 weeks post microwave ablation (MWA): image shows large hypodense cavity (arrow) with margins covering the targeted lesion. c 6 months post MWA: image shows well-defined cavity (arrow) with decreased diameter and no APHE. The treated observation is categorized LR-TR Nonviable
