Abstract #4341
Quantitative evaluation of two marker fixation systems for prospective motion correction
Nicolas Adrien Pannetier 1,2 , Theano Stravinos 2 , Peter Ng 2 , Michael Herbst 3 , Maxim Zaitsev 3 , Gerald Matson 1,2 , and Norbert Schuff 1,2
1
Department of Radiology and Biomedical
Imaging, University of California San Francisco, San
Francisco, CA, United States,
2
Centre
for Imaging of Neurodegenerative Diseases, VA Medical
Center, San Francisco, CA, United States,
3
Department
of Radiology, University Medical Center Freiburg,
Freiburg, Germany
Motion artifacts in MRI images can be reduced with
prospective motion correction system. However, results
are sensitive to the accuracy of the motion tracking
system and finding a sensitive metric for quantifying
the effectiveness of the correction has been elusive. We
tested two different marker positions; either mounted on
the nose bridge or mounted on a mouth guard, and
proposed a quantitative approach to compare
effectiveness of motion correction. We found that the
mouth guard outperforms the nose bridge fixation for
accurately tracking the head motion and produce
motion-free images.
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