Dr. Alexander Brost Profile

Dr. Alexander Brost

at Siemens Healthineers

SPIE Involvement:

Author

Area of Expertise:

Motion Compensation , Segmentation , Object Reconstruction , Registration , Object Localization

Websites:

Company Website

Publications (15)

Proceedings Article | 18 March 2016 Paper

Interactive visualization for scar transmurality in cardiac resynchronization therapy

Sabrina Reiml, Daniel Toth, Maria Panayiotou, Bernhard Fahn, Rashed Karim, Jonathan Behar, Christopher Rinaldi, Reza Razavi, Kawal Rhode, Alexander Brost, Peter Mountney

Proceedings Volume 9786, 97862S (2016) https://doi.org/10.1117/12.2214737

KEYWORDS: Visualization, Heart, Lead, 3D modeling, Cardiology, Electrophysiology, Electrical breakdown, Image segmentation, Visual process modeling, 3D acquisition, 3D visualizations, Tissues, Magnetic resonance imaging

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SPIE Journal Paper | 22 May 2014

Automatic planning of atrial fibrillation ablation lines using landmark-constrained nonrigid registration

Martin Koch, Alexander Brost, Felix Bourier, Joachim Hornegger, Norbert Strobel

JMI, Vol. 1, Issue 01, 015002, (May 2014) https://doi.org/10.1117/12.10.1117/1.JMI.1.1.015002

KEYWORDS: Photovoltaics, 3D modeling, Process modeling, Atrial fibrillation, Image registration, 3D acquisition, Data modeling, 3D image processing, Visualization, Veins

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Proceedings Article | 15 March 2013 Paper

Reconstruction method for curvilinear structures from two views

Matthias Hoffmann, Alexander Brost, Carolin Jakob, Martin Koch, Felix Bourier, Klaus Kurzidim, Joachim Hornegger, Norbert Strobel

Proceedings Volume 8671, 86712F (2013) https://doi.org/10.1117/12.2006346

KEYWORDS: Cameras, Endoscopes, 3D image processing, Lithium, Associative arrays, Heart, Solids, Reconstruction algorithms, Silver, Medicine

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Proceedings Article | 8 March 2013 Paper

Cryo-balloon catheter localization in fluoroscopic images

Tanja Kurzendorfer, Alexander Brost, Carolin Jakob, Philip Mewes, Felix Bourier, Martin Koch, Klaus Kurzidim, Joachim Hornegger, Norbert Strobel

Proceedings Volume 8671, 86710C (2013) https://doi.org/10.1117/12.2006543

KEYWORDS: Blob detection, Atrial fibrillation, Collimators, Detection and tracking algorithms, Veins, Tissues, Bismuth, X-rays, Photovoltaics, Liquids

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Proceedings Article | 8 March 2013 Paper

Respiratory motion influence on catheter contact force during radio frequency ablation procedures

Martin Koch, Alexander Brost, Joachim Hornegger, Norbert Strobel

Proceedings Volume 8671, 86710D (2013) https://doi.org/10.1117/12.2006369

KEYWORDS: Veins, Heart, 3D modeling, Data modeling, Atrial fibrillation, Motion analysis, X-ray imaging, Fluoroscopy, Silver, Medicine

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Proceedings Article | 8 March 2013 Paper

Non-photorealistic rendering for minimally invasive procedures

Jens Raab, Henry Schäfer, Alexander Brost, Marc Stamminger, Marcus Pfister

Proceedings Volume 8671, 86710M (2013) https://doi.org/10.1117/12.2001385

KEYWORDS: Visualization, Image fusion, X-ray imaging, X-rays, Image segmentation, Visibility, 3D image processing, Magnetic resonance imaging, Light sources and illumination, Data hiding

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Proceedings Article | 23 February 2012 Paper

Post-procedural evaluation of catheter contact force characteristics

Martin Koch, Alexander Brost, Atilla Kiraly, Norbert Strobel, Joachim Hornegger

Proceedings Volume 8315, 83152J (2012) https://doi.org/10.1117/12.912315

KEYWORDS: Visualization, 3D modeling, Atrial fibrillation, Data modeling, Veins, Electrophysiology, Silver, Medicine, Haptic technology

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Proceedings Article | 17 February 2012 Paper

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

Alexander Brost, Felix Bourier, Andreas Wimmer, Martin Koch, Atilla Kiraly, Rui Liao, Klaus Kurzidim, Joachim Hornegger, Norbert Strobel

Proceedings Volume 8316, 83162V (2012) https://doi.org/10.1117/12.911338

KEYWORDS: 3D modeling, 3D image processing, Image segmentation, X-rays, Motion models, Atrial fibrillation, Fluoroscopy, X-ray imaging, Electrophysiology, Image registration

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Proceedings Article | 17 February 2012 Paper

Real-time motion-adjusted augmented fluoroscopy system for navigation during electrophysiology procedures

Atilla Kiraly, Julien Barbot, Wen Wu, Terrence Chen, Alexander Brost, Martin Koch, Carolin Jakob, Tanja Kurzendorfer, Norbert Strobel

Proceedings Volume 8316, 831626 (2012) https://doi.org/10.1117/12.912298

KEYWORDS: Heart, Fluoroscopy, Navigation systems, 3D modeling, Electrophysiology, Veins, 3D image processing, Electrodes, X-rays, Signal detection

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Proceedings Article | 17 February 2012 Paper

Navigation for fluoroscopy-guided cryo-balloon ablation procedures of atrial fibrillation

Felix Bourier, Alexander Brost, Andreas Kleinoeder, Tanja Kurzendorfer, Martin Koch, Attila Kiraly, Hans-Juergen Schneider, Joachim Hornegger, Norbert Strobel, Klaus Kurzidim

Proceedings Volume 8316, 831627 (2012) https://doi.org/10.1117/12.911446

KEYWORDS: Optical spheres, Atrial fibrillation, Fluoroscopy, Visualization, Veins, 3D image processing, Optical tracking, 3D modeling, Magnetic resonance imaging, Silver

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Proceedings Article | 17 February 2012 Paper

Cryo-balloon catheter position planning using AFiT

Andreas Kleinoeder, Alexander Brost, Felix Bourier, Martin Koch, Klaus Kurzidim, Joachim Hornegger, Norbert Strobel

Proceedings Volume 8316, 83162R (2012) https://doi.org/10.1117/12.911303

KEYWORDS: Veins, Transparency, Visualization, Image segmentation, Atrial fibrillation, Heart, 3D image processing, Electrophysiology, Cameras, Tissues

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Proceedings Article | 2 March 2011 Paper

First steps towards initial registration for electrophysiology procedures

Alexander Brost, Felix Bourier, Liron Yatziv, Martin Koch, Joachim Hornegger, Norbert Strobel, Klaus Kurzidim

Proceedings Volume 7964, 79641P (2011) https://doi.org/10.1117/12.877654

KEYWORDS: Image registration, Magnetic resonance imaging, Veins, X-rays, Electrophysiology, Atrial fibrillation, X-ray imaging, Visualization, X-ray computed tomography, 3D image processing

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Proceedings Article | 2 March 2011 Paper

Motion compensation by registration-based catheter tracking

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

Proceedings Volume 7964, 79641O (2011) https://doi.org/10.1117/12.877650

KEYWORDS: Image segmentation, X-rays, Motion models, Fluoroscopy, 3D image processing, Motion estimation, Atrial fibrillation, Veins, X-ray imaging, Image registration

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Proceedings Article | 24 February 2010 Paper

3D model-based catheter tracking for motion compensation in EP procedures

Alexander Brost, Rui Liao, Joachim Hornegger, Norbert Strobel

Proceedings Volume 7625, 762507 (2010) https://doi.org/10.1117/12.843999

KEYWORDS: 3D modeling, Motion models, 3D image processing, Motion estimation, Model-based design, X-rays, Fluoroscopy, Heart, X-ray imaging, Atrial fibrillation

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Proceedings Article | 13 March 2009 Paper

Accuracy of x-ray image-based 3D localization from two C-arm views: a comparison between an ideal system and a real device

Alexander Brost, Norbert Strobel, Liron Yatziv, Wesley Gilson, Bernhard Meyer, Joachim Hornegger, Jonathan Lewin, Frank Wacker

Proceedings Volume 7261, 72611Z (2009) https://doi.org/10.1117/12.811147

KEYWORDS: Imaging systems, X-rays, 3D modeling, X-ray imaging, Matrices, 3D image processing, Medicine, Sensors, Silver, Calibration

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arm X-ray imaging devices are commonly used for minimally invasive cardiovascular or other interventional procedures. Calibrated state-of-the-art systems can, however, not only be used for 2D imaging but also for three-dimensional reconstruction either using tomographic techniques or even stereotactic approaches. To evaluate the accuracy of X-ray object localization from two views, a simulation study assuming an ideal imaging geometry was carried out first. This was backed up with a phantom experiment involving a real C-arm angiography system. Both studies were based on a phantom comprising five point objects. These point objects were projected onto a flat-panel detector under different C-arm view positions. The resulting 2D positions were perturbed by adding Gaussian noise to simulate 2D point localization errors. In the next step, 3D point positions were triangulated from two views. A 3D error was computed by taking differences between the reconstructed 3D positions using the perturbed 2D positions and the initial 3D positions of the five points. This experiment was repeated for various C-arm angulations involving angular differences ranging from 15° to 165°. The smallest 3D reconstruction error was achieved, as expected, by views that were 90° degrees apart. In this case, the simulation study yielded a 3D error of 0.82 mm ± 0.24 mm (mean ± standard deviation) for 2D noise with a standard deviation of 1.232 mm (4 detector pixels). The experimental result for this view configuration obtained on an AXIOM Artis C-arm (Siemens AG, Healthcare Sector, Forchheim, Germany) system was 0.98 mm ± 0.29 mm, respectively. These results show that state-of-the-art C-arm systems can localize instruments with millimeter accuracy, and that they can accomplish this almost as well as an idealized theoretical counterpart. High stereotactic localization accuracy, good patient access, and CT-like 3D imaging capabilities render state-of-the-art C-arm systems ideal devices for X-ray based minimally invasive procedures.

Showing 5 of 15 publications

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