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.
Keywords