Alexander Aranovitch1, Maximilian Haeberlin1, Simon Gross1, Thomas Schmid1, and Klaas Paul Pruessmann1
A field-detection
based method for prospective motion correction is proposed which uses the
sequence itself for localizing NMR field probes. No additional gradients or
increase of the sequence duration are required to apply this method to various
MR sequences, such as clinically relevant spin-warp sequences. The proposed
method collects high-frequency information present due to gradient switching
from multiple short, temporally separated snippets within one TR. A precision on
the order of 10µm and 0.01° (RMS) for translational and rotational degrees of
freedom is obtained. The method is demonstrated in-vivo with high-resolution
T2*-weighted gradient echo scans.
