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Single-voxel MRS with prospective motion correction and retrospective frequency correction

✍ Scribed by M. Zaitsev; O. Speck; J. Hennig; M. Büchert

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
507 KB
Volume
23
Category
Article
ISSN
0952-3480

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✦ Synopsis

Abstract

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.

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