Temperature-dependent electrode repositioning for multiple overlapping radiofrequency ablation in ex vivo porcine livers.

Purpose: Overlapping ablations can be used to increase radiofrequency ablation volume. Our goal was to determine, in a porcine model, the relationship of ablation size and temperature for single ablation, and to compare the extent of necrosis resulting from temperature-dependent electrode positioning versus fixed-distance dual ablation.

Materials And Methods: The experiments were performed in two parts (single and dual ablations).