Abstract #1597
Tracking Discrete Off-resonance markers with Three Spokes (trackDOTS) a new motion tracking methodology
Jos P. Marques 1 , Daniel Gallichan 2 , and Rolf Gruetter 2,3
1
CIBM, Department of Radiology, University of
Lausanne, Lausanne, Vaud, Switzerland,
2
LIFMET,
cole Polytechnique Fdrale de Lausanne, Vaud,
Switzerland,
3
CIBM,
Department of Radiology, University of Lausanne and
Geneva, Vaud, Switzerland
In this work we evaluate the possibility to perform
motion tracking of a subjects head by using small MR
markers containing a liquid which is off-resonance in
respect to water. TrackDOTS is able to determine the
position of various MR markers with 3 orthogonal k-space
readouts by constructing receive coil modes that limit
the sensitivity to regions of the various markers. The
methodology was demonstrated in vivo showing high
correlation between the motion parameters obtained using
conventional MR image co-registration and the proposed
methodology.
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