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Abstract #3366

Towards Optimal Design of Orbital K-Space Navigators for 3D Rigid-Body Motion Estimation

Thomas Ulrich1, Franz Patzig1, Bertram Jakob Wilm1, and Klaas Paul Pruessmann1
1Institute for Biomedical Engineering, ETH Zurich and University of Zurich, Zurich, Switzerland

A single-shot k-space navigator trajectory and a corresponding motion estimation algorithm is proposed. They allow for 3D rigid-body motion estimation. Their performance in terms of accuracy and precision is studied and a cross-validation experiment is conducted to show that the method is suitable for in-vivo use. The accuracy and precision of the method depend on the orbital radius of the navigator. A simulation study is conducted to determine the best choice of the navigator radius.

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