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Hepatic bipolar radiofrequency ablation using perfused-cooled electrodes: a comparative study in the ex vivo bovine liver

¹ Department of Radiology and Institute of Radiation Medicine, Seoul National University College of Medicine and ² Clinical Research Institute, Seoul National University Hospital, 28 Yongon-dong, Chongno-gu, Seoul, 110-744 Korea

View larger version (90K): [in a new window]   Figure 1. A photograph of a perfused-cooled electrode that contains two coaxial lumina that enable cooling water to circulate through the electrode, and a separate lumen for saline interstitial infusion.

View larger version (16K): [in a new window]   Figure 2. A graph showing changes of mean temperatures at the midpoint between the two electrode tips in each group during radiofrequency ablation (RFA).

View larger version (102K): [in a new window]   Figure 3. Comparison of radiofrequency-induced coagulation in the three groups. Note that the mean shortest coagulation diameters at midpoint between the two electrode tips were larger in group A than in groups B and C. (a) Photograph of specimen from group A. (b) Photograph of specimen from group B. (c) Photograph of specimen from group C.