The standard approach in interventional treatment of atrial fibrillation (AFib) is pulmonary vein isolation (PVI). PVI can be achieved by placing radio-frequency (RF) lesions contiguously around the pulmonary veins attached to the left atrium. Since accurate lesion placement may be difficult, pre-planned ablation lines can be used for better navigation both when using mapping systems or also when relying on fluoro overlay techniques. By working with physicians in
this field, we learned that clinically acceptable ablation lines are not necessarily limited to a unique line, but there appears to be some flexibility when defining regions within which ablation should be performed.

We investigate the dimensions of such a region based on comparing pre-planned ablation lines set up for different left atria. A common reference model is used as a means to combine and compare different pre-planned ablation lines.This is the first step towards our goal of automatic pre-planning of ablation lines for PVI procedures.