Figure 4.

Local recurrence rates according to the width of the safety margin. (A) When the ablated margin was wide, the local recurrence rate was low. (B) For nodules with a narrow safety margin (<5 mm), local recurrence is rare if ablation covered the entire blood drainage area (blue line). (C) Local recurrence rates for ablation with or without coverage of the entire blood drainage area in patients with safety margins 6–10 mm. Among the nodules with wide safety margins (>6 mm), the risk of local recurrence was higher if ablation did not cover the entire blood drainage area (red line).