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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