Journal
NMR IN BIOMEDICINE
Volume 23, Issue 3, Pages 325-332Publisher
WILEY
DOI: 10.1002/nbm.1469
Keywords
MR spectroscopy; motion correction; interleaved reference scan, optical motion tracking
Funding
- German Federal Ministry of Education and Research [01EQ0605]
- US National Institute of Health [RO1DA021146]
- NATIONAL INSTITUTE ON DRUG ABUSE [R01DA021146] Funding Source: NIH RePORTER
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Subject motion during MRS investigations is a factor limiting the quality and the diagnostic value of the spectra. The possibility of using external motion tracking data to correct for artefacts in MR imaging has been demonstrated previously. In this paper the utility of prospective motion correction for single-voxel proton MRS is investigated. The object motion data are used in real time to update the position of the spectroscopy voxel during the acquisition prior to every sequence repetition cycle. It is not, however, sufficient to update the voxel position alone due to shim changes accompanying subject motion. Adverse effects of frequency shifts induced by subject motion are effectively suppressed by the interleaved reference scan method. Copyright (C) 2010 John Wiley & Sons, Ltd.
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