Therapeutic response assessment of RFA for HCC: Contrast-enhanced US, CT and MRI

Figure 2 A 80-year-old woman with 2. 5 cm hepatocellular carcinoma after radiofrequency ablation combined with transcatheter arterial chemoembolization. Early-phase dynamic computed tomography shows a high-density center indicating Lipiodol deposition in hepatocellular carcinoma (white arrow) and a surrounding low-density zone indicating radiofrequency ablation-induced coagulation necrosis of the liver. A microsatellite (black arrow) was depicted as a high-density spot in the low-density zone. Therefore, this ablation therapy achieved complete necrosis of chief tumor and micrometastasis. Moreover, hyperemia surrounding the ablated lesion is depicted as peripheral rim enhancement (arrowheads).