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Single‐voxel MRS with prospective motion correction and retrospective frequency correction
Author(s) -
Zaitsev M.,
Speck O.,
Hennig J.,
Büchert M.
Publication year - 2010
Publication title -
nmr in biomedicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.278
H-Index - 114
eISSN - 1099-1492
pISSN - 0952-3480
DOI - 10.1002/nbm.1469
Subject(s) - voxel , shim (computing) , motion (physics) , position (finance) , computer science , computer vision , centroid , artificial intelligence , match moving , nuclear magnetic resonance , nuclear medicine , physics , medicine , finance , erectile dysfunction , economics
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 © 2010 John Wiley & Sons, Ltd.