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Abstract #4157

Model-Based Catheter Shape Reconstruction for Interventional MRI

Carsten Oliver Schirra1, Philip G. Batchelor1, Reza Razavi1, Sebastian Kozerke1,2, Tobias Schaeffter1

1Division of Imaging Sciences, Kings College London, London, Greater London, United Kingdom; 2Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland

Conventional MR imaging methods result in prohibitively long measurement times hampering 3D catheter imaging in real-time. Despite progress in applying spare signal sampling theorems to catheter imaging, undersampling factors remain limited. In the present work a model-based reconstruction technique is proposed which determines the parameters describing the catheter shape directly in undersampled k-space data exploiting the limited degrees of freedom necessary. A parameterized model of a catheter is fitted by minimizing the l2-norm. It is demonstrated that the catheter shape can be reconstructed from highly undersampled data indicating the potential of the method for 3D real-time imaging of catheter devices.