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bipolar radiofrequency

bipolar radiofrequency ablation

Case 1: Bipolar Technique

Bipolar Technique:(a)Colorectal metastasis of the segment IV in a 53-year-old-woman with residual tumor after chemotherapy (b)planning before RFA treatment.(c)The second electrode (or ground)is placed within 3 cm of the active electrode.This results in heat being generated not only at the active electrode but also adjacent to the ground needle and between the two electrodes. (d)CT scan obtained 4 months after RFA with complete ablation. (e)The electrode track had been cauterized (arrowheads).

Case 2: Bipolar Technique

Bipolar Technique: (a)Sub capsular liver metastasis (5 cm-diameter)in a 42-year-old-woman. (b,c,d,)Bipolar technique under CT guidance.(e,f). The resulting area of thermal lesion is larger than when a conventional monopolar electrode system is used and the induced coagulation necrosis is elliptic rather than spherical.