Aaron T. Hess1, Andr J. W. van Der Kouwe2, Ernesta M. Meintjes1
1MRC/UCT Medical Imaging Research Unit, Human Biology, University of Cape Town, Cape Town, South Africa; 2Radiology, Massachusetts General Hospital, Boston, MA, United States
The EPI volume navigator (vNav) is capable of measuring and correcting both head movement and B0 changes in real time. We assess the quality of spectra obtained using the vNav in 36 single voxel spectroscopy scans acquired from 14 five year old children in three different volumes of interest. Of the resulting 36 scans, four children moved enough to produce a 2 mm or greater shift in the voxel position. Despite these movements we obtained across all 36 scans linewidths between 2 Hz and 5 Hz. Further we demonstrate the motion, frequency and first order shim corrections applied by the vNav in one of scans where the child was particularly restless.