Figure 4From: Effective palliative radiofrequency ablation for tumors causing pain, numbness and motor function disorders: case seriesCase 2: Non- contrast CT on the first ablation session. A LeVeen electrode is located near the center of the tumor, and retractable hooks are fully opened (arrowhead). In this session, “roll-off” was not obtained even though ablation was continued for 20 minutes.Back to article page