Template-based CTA X-ray angio rigid registration of coronary arteries in frequency domain
Aksoy T, Demirci S, Degertekin M, Navab N, Unal G (2013)
Publication Type: Conference contribution
Publication year: 2013
Journal
Book Volume: 8671
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: USA
ISBN: 9780819494450
DOI: 10.1117/12.2007963
Abstract
This study performs 3D to 2D rigid registration of segmented pre-operative CTA coronary arteries with a single segmented intra-operative X-ray Angio frame in both frequency and spatial domains for real-time Angiography interventions by C-arm fluoroscopy. Most of the work on rigid registration in literature required a close initialization of poses and/or positions because of the abundance of local minima and high complexity that searching algorithms face. This study avoids such setbacks by transforming the projections into translation-invariant Fourier domain for estimating the 3D pose. First, template DRRs as candidate poses of 3D vessels of segmented CTA are produced by rotating the camera (image intensifier) around the DICOM angle values with a wide range as in C-arm setup. We have compared the 3D poses of template DRRs with the real X-ray after equalizing the scales (due to disparities in focal length distances) in 3 domains, namely Fourier magnitude, Fourier phase and Fourier polar. The best pose candidate was chosen by one of the highest similarity measures returned by the methods in these domains. It has been noted in literature that these methods are robust against noise and occlusion which was also validated by our results. Translation of the volume was then recovered by distance-map based BFGS optimization well suited to convex structure of our objective function without local minima due to distance maps. Final results were evaluated in 2D projection space rather than with actual values in 3D due to lack of ground truth, ill-posedness of the problem which we intend to address in future. © 2013 SPIE.
Involved external institutions
Turkey (TR)
Germany (DE)How to cite
APA:
Aksoy, T., Demirci, S., Degertekin, M., Navab, N., & Unal, G. (2013). Template-based CTA X-ray angio rigid registration of coronary arteries in frequency domain. In Proceedings of SPIE - The International Society for Optical Engineering. USA.
MLA:
Aksoy, Timur, et al. "Template-based CTA X-ray angio rigid registration of coronary arteries in frequency domain." Proceedings of the Medical Imaging 2013: Image-Guided Procedures, Robotic Interventions, and Modeling, USA 2013.
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