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a Immediate post-IRE CEUS demonstrated complete non-enhancement in the ablation zone. The boundary of the non-enhanced area was clearly outlined. b A follow-up scan one day after IRE also showed complete non-enhancement. c A 46-year-old man presented with hepatic carcinoma. One month after IRE ablation, a hyper-enhanced lesion was observed in the early arterial phase. d The hyper-enhanced foci washed out during the late arterial phase
