SLOMOCO-derived slicewise head motion produces physiologic signals and reveals that motion is hard to characterize
Erik Beall 1 and Mark Lowe 1
Imaging Institute, Cleveland Clinic,
Cleveland, OH, United States
Head motion is a major confound in BOLD imaging. Until
very recently, it was only possible to use volumetric
motion parameters. Hence, the distribution of typical
head motion and the frequency spectrum at the slice
level are unknown. We investigate these and find that
while these are different, its not unexpected given the
different frequency with which each measure is
operating. However, we also find clear physiologic noise
signatures and demonstrate that SLOMOCO can be used to
obtain pulse and respiration traces.
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