Generation of 4D Access Corridors from Real-Time Multislice MRI for Guiding Transapical Aortic Valvuloplasties
Real-time image-guided cardiac procedures (manual or robot-assisted) are emerging due to potential improvement in patient management and reduction in the overall cost. These minimally invasive procedures require both real-time visualization and guidance for maneuvering an interventional tool safely inside the dynamic environment of a heart. In this work, we propose an approach to generate dynamic 4D access corridors from the apex to the aortic annulus for performing real-time MRI guided transapical valvuloplasties. Ultrafast MR images (collected every 49.3 ms) are processed on-the-fly using projections to extract a conservative dynamic trace in form of a three-dimensional access corridor. Our experimental results show that the reconstructed corridors can be refreshed with a delay of less than 0.5ms to reflect the changes inside the left ventricle caused by breathing motion and the heartbeat.
KeywordsCardiac Interventions Real-Time Image-Guided Interventions 4D Access Corridors Magnetic Resonance Imaging
- 1.Guttman, M.A., Ozturk, C., Raval, A.N., Raman, V.K., Dick, A.J., DeSilva, R., Karmarkar, P., Lederman, R.J., McVeigh, E.R.: Interventional cardiovascular procedures guided by real-time mr imaging: an interactive interface using multiple slices, adaptive projection modes and live 3d renderings. Journal of Magnetic Resonance Imaging 26(6), 1429–1435 (2007)CrossRefGoogle Scholar
- 5.Loop, C.: Smooth subdivision surfaces based on triangles (master thesis) department of mathematics, university of utah (1987)Google Scholar
- 9.Yeniaras, E., Deng, Z., Syed, M.A., Davies, M., Tsekos, N.V.: Virtual reality system for preoperative planning and simulation of image guided intracardiac surgeries with robotic manipulators. In: Studies in Health Technology and Informatics, vol. 163, pp. 716–722. IOS Press, Amsterdam (2011)Google Scholar
- 10.Zhou, Y., Yeniaras, E., Tsiamyrtzis, P., Tsekos, N., Pavlidis, I.: Collaborative tracking for MRI-guided robotic intervention on the beating heart. In: Jiang, T., Navab, N., Pluim, J.P.W., Viergever, M.A. (eds.) MICCAI 2010. LNCS, vol. 6363, pp. 351–358. Springer, Heidelberg (2010)CrossRefGoogle Scholar