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Abstract #3308

Motion Artefact Correction in Spectroscopic Imaging Using an EPI Navigator and Reacquisition

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.