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Proceedings Paper

Real-time circumferential mapping catheter tracking for motion compensation in atrial fibrillation ablation procedures
Author(s): Alexander Brost; Felix Bourier; Andreas Wimmer; Martin Koch; Atilla Kiraly; Rui Liao; Klaus Kurzidim; Joachim Hornegger; Norbert Strobel
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Paper Abstract

Atrial fibrillation (AFib) has been identified as a major cause of stroke. Radiofrequency catheter ablation has become an increasingly important treatment option, especially when drug therapy fails. Navigation under X-ray can be enhanced by using augmented fluoroscopy. It renders overlay images from pre-operative 3-D data sets which are then fused with X-ray images to provide more details about the underlying soft-tissue anatomy. Unfortunately, these fluoroscopic overlay images are compromised by respiratory and cardiac motion. Various methods to deal with motion have been proposed. To meet clinical demands, they have to be fast. Methods providing a processing frame rate of 3 frames-per-second (fps) are considered suitable for interventional electrophysiology catheter procedures if an acquisition frame rate of 2 fps is used. Unfortunately, when working at a processing rate of 3 fps, the delay until the actual motion compensated image can be displayed is about 300 ms. More recent algorithms can achieve frame rates of up to 20 fps, which reduces the lag to 50 ms. By using a novel approach involving a 3-D catheter model, catheter segmentation and a distance transform, we can speed up motion compensation to 25 fps which results in a display delay of only 40 ms on a standard workstation for medical applications. Our method uses a constrained 2-D/3-D registration to perform catheter tracking, and it obtained a 2-D tracking error of 0.61 mm.

Paper Details

Date Published: 17 February 2012
PDF: 6 pages
Proc. SPIE 8316, Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling, 83162V (17 February 2012); doi: 10.1117/12.911338
Show Author Affiliations
Alexander Brost, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Felix Bourier, Klinik fur Herzrhythmusstorungen, Krankenhaus Barmherzige Bruder (Germany)
Andreas Wimmer, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Martin Koch, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Atilla Kiraly, Siemens Corporate Research (United States)
Rui Liao, Siemens Corporate Research (United States)
Klaus Kurzidim, Klinik fur Herzrhythmusstorungen, Krankenhaus Barmherzige Bruder (Germany)
Joachim Hornegger, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
School in Advanced Optical Technologies (Germany)
Norbert Strobel, Siemens AG (Germany)

Published in SPIE Proceedings Vol. 8316:
Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling
David R. Holmes III; Kenneth H. Wong, Editor(s)

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