Fig. 4

a1 and a2 show the CEUS-CT fused image. a1 shows the overlapped image of CEUS and CT. The HCC lesion and 5-mm AM are outlined in blue and yellow, respectively. The ablative area in CEUS was anechoic and is outlined with a dotted line (arrowhead). In a1, the ablative area just covers the tumor, and part of the AM is not covered by the ablative area (arrow). Thus, the CEUS-CT fused image shows that this HCC lesion has an inadequate AM at the site indicated by the arrow. In the CT image in a2, the HCC lesion and 5-mm AM are outlined in blue and yellow, respectively. One month after ablation, the CT revealed complete ablation of the lesion, and the serum AFP fell to a normal level. However, 9 months after ablation, the serum AFP again increased. LTP was shown by CEUS (b) and CT (c) at the same site with an inadequate AM as in a1 (arrow)