shapes RF ablation has some limitations and generally does not achieve comparable success rates to microwave ablation or high-intensity focused ultrasound therapies. To shape RF ablations for matching a tumor size, we have developed an electronic channel switch box for two bipolar needles that generates multiple selectable ablation patterns. The setup can be used with commercially available mono- or bipolar RF generator. The switch box
provides ten selectable ablation procedures to generate dierent ablation patterns without a relocation of a needle.