Constrained 2-D/3-D Registration for Motion Compensation in AFib Ablation Procedures

Brost, Alexander; Wimmer, Andreas; Liao, Rui; Hornegger, Joachim; Strobel, Norbert

doi:10.1007/978-3-642-21504-9_13

Cited by 4 publications

(14 citation statements)

References 24 publications

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“…The visualized outline of the cryo-balloon helps the physician to see the dimensions of the balloon catheter, otherwise hardly visible under X-ray. Our cryo-balloon catheter tracking method could also be combined with a motion-adjusted 3-D overlay rendered from preoperative data [7,8]. Such an example is given in Fig.…”

Section: Discussionmentioning

confidence: 99%

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Cryo-Balloon Catheter Tracking in Atrial Fibrillation Ablation Procedures

Kurzendorfer

Brost

Bourier

et al. 2012

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Abstract. Radio-frequency (RF) catheter ablation has become the standard treatment of atrial fibrillation if pharmacotherapy fails. As an alternative to traditional RF standard ablation catheters, single-shot devices have received more and more interest. One group of these devices are cryo-balloon catheters. Such catheters are designed to electrically isolate a pulmonary vein (PV) with only a few applications, ideally only one. Whereas standard radio-frequency ablation catheters operate point by point, cryo-balloon devices need to be positioned antrally to the pulmonary vein ostium before freezing. If a good seal can be achieved far enough outside of the pulmonary veins, the cryo-balloon is an effective and safe ablation device. The catheters are inserted through a transseptal sheath and are inflated using liquid nitrogen. Single-shot devices, when used successfully, promise a reduction of procedure time and Xray exposure. Single-shot devices based on ablation energies other than RF, may not carry electrodes or electromagnetic sensors. This makes it difficult to visualize them using standard EP mapping systems. As a result, fluoroscopic imaging is needed. Unfortunately, the inflated balloon may be difficult to see under X-ray. To improve this situation, we propose a new method that tracks and enhances the visualization of a cryo-balloon catheter under fluoroscopic imaging. The method involves a 2-D template of the cryo-balloon that is manually initialized and then tracks the balloon device during live X-ray imaging. To improve visualization, a 2-D ellipse is overlaid onto the fluoroscopic imaging to highlight the position of the balloon catheter. The tracking error was calculated as the distance between the tracked catheter template and the manually segmented catheter. Our method achieved 2-D tracking error of 0.60 mm ± 0.32 mm.

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Section: Discussionmentioning

confidence: 99%

“…Future work will focus on tracking the catheter by other means than template matching. Learning based approaches such as in [8] and [10] provide a more robust framework for tracking. In addition, they might also be applicable without manual initialization.…”

Section: Fig 3 (C)mentioning

confidence: 99%

Cryo-Balloon Catheter Tracking in Atrial Fibrillation Ablation Procedures

Kurzendorfer

Brost

Bourier

et al. 2012

Bildverarbeitung Für Die Medizin 2012

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“…Compared to the monoplane method in [2], the newly proposed method does not require manual re-initialization of the catheter model when C-arm angulation changes, minimizing user interaction during interventions. The catheter segmentation method not only has to be reliable, but it needs to be fast as well.…”

Section: Model Generationmentioning

confidence: 99%

“…This work was extended regarding robustness using a learning-based catheter segmentation. The approach was also modified to work on monoplane systems as well [2]. The latest extension of this work can be found in [2].…”

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confidence: 99%

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Real-time circumferential mapping catheter tracking for motion compensation in atrial fibrillation ablation procedures

et al. 2012

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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. By using a novel approach involving a 3-D catheter model, catheter segmentation and a distance transform, we can speed up motion compensation to 20 fps which results in a display delay of only 50 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.

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Cryo-balloon catheter localization in fluoroscopic images

et al. 2013

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Abstract. Minimally invasive catheter ablation has become the preferred treatment option for atrial fibrillation. Although the standard ablation procedure involves ablation points set by radio-frequency catheters, cryo-balloon catheters have even been reported to be more advantageous in certain cases. As electro-anatomical mapping systems do not support cryo-balloon ablation procedures, X-ray guidance is needed. However, current methods to provide support for cryo-balloon catheters in fluoroscopically guided ablation procedures rely heavily on manual user interaction. To improve this, we propose a first method for automatic cryo-balloon catheter localization in fluoroscopic images based on a blob detection algorithm. Our method is evaluated on 24 clinical images from 17 patients. The method successfully detected the cryoballoon in 22 out of 24 images, yielding a success rate of 91.6 %. The successful localization achieved an accuracy of 1.00 mm ± 0.44 mm. Even though our methods currently fails in 8.4 % of the images available, it still offers a significant improvement over manual methods. Furthermore, detecting a landmark point along the cryo-balloon catheter can be a very important step for additional post-processing operations.

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Constrained 2-D/3-D Registration for Motion Compensation in AFib Ablation Procedures

Cited by 4 publications

References 24 publications

Cryo-Balloon Catheter Tracking in Atrial Fibrillation Ablation Procedures

Cryo-Balloon Catheter Tracking in Atrial Fibrillation Ablation Procedures

Real-time circumferential mapping catheter tracking for motion compensation in atrial fibrillation ablation procedures

Cryo-balloon catheter localization in fluoroscopic images

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