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Image integration using NavX Fusion: initial experience and validation
Anthony G Brooks1, Lauren Wilson, Pawel Kuklik
1Cardiovascular Research Centre, Department of Cardiology, Royal Adelaide Hospital and Disciplines of Medicine and Physiology, University of Adelaide, Adelaide, South Australia.
Heart Rhythm
|March 26, 2008
Summary
NavX Fusion software accurately integrates computed tomography (CT) images for atrial fibrillation ablation, improving navigation and reducing fluoroscopic time with increased experience.
Area of Science:
- Cardiology
- Medical Imaging
- Electrophysiology
Background:
- 3D virtual anatomic navigation is crucial for complex arrhythmia mapping and ablation.
- NavX Fusion software aims to align virtual anatomy with patient CT scans.
- The accuracy and clinical utility of NavX Fusion require evaluation.
Purpose of the Study:
- To assess the accuracy of CT image integration using NavX Fusion.
- To describe the initial clinical experience with NavX Fusion for atrial fibrillation ablation.
Main Methods:
- 55 patients undergoing atrial fibrillation ablation with NavX Fusion were studied.
- Left atrial geometries from NavX were compared to CT scans for geometric match.
- Navigational accuracy and fusion integration/procedural times were recorded.
Main Results:
- CT-NavX geometric errors decreased progressively with fusion stages (GEO-1: 6.6mm, GEO-2: 4.1mm, GEO-3: 1.9mm).
- Navigational accuracy to anatomical surfaces was consistent across fused geometries and CT (3.4mm).
- Image integration time and normalized fluoroscopic time decreased with increasing case number.
Conclusions:
- NavX Fusion software provides highly accurate CT image integration for arrhythmia ablation.
- The system demonstrates a learning curve effect, reducing procedure time and fluoroscopy.
- This technology enhances the safety and efficiency of atrial fibrillation ablation procedures.
