Comparison between combination therapy of percutaneous ethanol injection and radiofrequency ablation and radiofrequency ablation alone for patients with hepatocellular carcinoma

Figure 3 Relationship between the amount of total energy requirement and the volume of coagulated necrosis or the energy requirement for inducing per unit volume of coagulated necrosis in PEI-RFA. PEI-RFA was performed on 60 patients with HCC. The ablation was done by using the Cool-tip RF system. The amount of total energy requirement positively correlated with the volume of coagulated necrosis (r = 0.47, P = 0.0013), whereas no significant correlation was admitted between the total amount of energy requirement and the energy requirement for inducing per unit volume of coagulated necrosis (r = 0.35, P = 0.13) in PEI-RFA.