Andreas Hock1,
Spyros S. Kollias2, Peter Boesiger3, Anke Henning3,
4
1Institute
for Biomedical Engineering , University and ETH Zurich , Zurich, Switzerland;
2Institute of Neuroradiology, University Hospital of Zurich,
Zurich, Switzerland; 3Institute for Biomedical Engineering,
University and ETH Zurich, Zurich, Switzerland; 4Max Planck
Institute for Biological Cybernetics, Max Plank Institute , Tuebingen, Germany
Subject motion is one of the major problems for MR spectroscopy since it often leads to inaccurate results. The detection of patient motion by observing exclusively the spectra is sometimes impossible. Therefore, in this investigation, 1D navigator acquisitions interleaved with non-water-suppressed MRS measurements are used for real-time subject-motion detection and correction in the spinal cord. Interleaved navigators allow precise real-time motion detection for MRS without the need of additional scan-time and additional hardware. Therefore, it allows early intervention (e.g. asking the subject to lay still) and in combination with non-water-suppressed MRS for a retrospective motion correction even in very small regions of interest like the spinal cord.
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