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Abstract #0883

Motion Correction of EPI sequences using their intrinsic high-frequency content

Maximilian Haeberlin 1 , Alexander Aranovitch 1,2 , Lars Kasper 1 , Christoph Barmet 1 , and Klaas Paul Pruessmann 1

1 Institute for Biomedical Engineering, University and ETH, Zurich, Zurich, Switzerland, 2 Department of Physics, Technische Universitt Mnchen, Bavaria, Germany

Neuro applications such as fMRI, DWI or PWE imaging that use EPI readouts for image encoding often suffer from rigid body motion of the head. We present a method that uses the high frequency content of the EPI trajectory to track the positions of a field probe array attached to the head that is robust against field fluctuations and is combined with concurrent field monitoring in the head frame of reference. We report a localization precision of 12 micrometers and show successful continuous slice tracking during a 3-minute EPI acquisiton well suited for fMRI.

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