Aaron Timothy Hess1, Ovidiu C. Andronesi2,
Matthew Dylan Tisdall2, A Gregory Sorensen2,3, Andre J.
van der Kouwe2, Ernesta M. Meintjes1
1University of Cape Town, Cape Town,
South Africa; 2Martinos Center for Biomedical Imaging,
Massachusetts General Hospital, MA; 3Department of Radiology,
Harvard Medical School, MA
Motion
in spectroscopy and spectroscopic imaging introduces three categories of
artefacts: i) a localising error; ii) a phase error arising from the
excitation process; and iii) the disruption of the B0 field. We present a
method to correct localisation and remove motion-induced phase errors by
using an EPI navigator for motion correction in a spectroscopic imaging,
LASER sequence. We show that by reacquiring scans where motion was detected the
phase error artefacts can be removed.
Keywords