| Prospective motion correction for magnetic resonance spectroscopy using single camera Retro-Grate reflector optical tracking. | |
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MedLine Citation:
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PMID: 21274994 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To introduce and evaluate a method of prospective motion correction for localized proton magnetic resonance spectroscopy (1H-MRS) using a single-camera optical tracking system. MATERIALS AND METHODS: Five healthy participants were scanned at 3T using a point-resolved spectroscopic sequence (PRESS) with a motion-tracking module and phase navigator. Head motion in six degrees was tracked with a Retro-Grate Reflector (RGR) tracking system and target via a mirror mounted inside the bore. Participants performed a series of three predetermined motion patterns during scanning. RESULTS: Left-right rotation (Rz) (average 12°) resulted in an increase in the total choline to total creatine ratio (Cho/Cr) of +14.6 ± 1.5% (P = 0.0009) for scans without correction, but no change for scans with correction (+1.1 ± 1.5%; P = 0.76). Spectra with uncorrected Z-translations showed large lipid peaks (skull) with changes in Cho/Cr of -13.2 ± 1.6% (P = 0.02, no motion correction) and -2.2 ± 2.4% (P = 0.51) with correction enabled. There were no significant changes in the ratios of N-acetylaspartate, glutamate+glutamine, or myo-inositol to creatine compared to baseline scans for all experiments. CONCLUSION: Prospective motion correction for 1H-MRS, using single-camera RGR tracking, can reduce spectral artifacts and quantitation errors in Cho/Cr ratios due to head motion and promises improved spectral quality and reproducibility. |
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Authors:
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Brian C Andrews-Shigaki; Brian S R Armstrong; Maxim Zaitsev; Thomas Ernst |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 33 ISSN: 1522-2586 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-28 Completed Date: 2011-05-13 Revised Date: 2012-02-02 |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 498-504 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Wiley-Liss, Inc. |
Affiliation:
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Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Artifacts* Biological Markers / analysis* Brain / metabolism* Equipment Design Equipment Failure Analysis Female Head Movements / physiology* Humans Magnetic Resonance Spectroscopy / instrumentation* Male Middle Aged Motion Optical Devices* |
| Grant Support | |
ID/Acronym/Agency:
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1R01 DA021146/DA/NIDA NIH HHS; G12 RR003061-21/RR/NCRR NIH HHS; G12 RR003061-22/RR/NCRR NIH HHS; K02 DA016991-05/DA/NIDA NIH HHS; R01 DA021146-03/DA/NIDA NIH HHS; R01 DA021146-05/DA/NIDA NIH HHS; U54 56883//PHS HHS; U54 NS056883-02/NS/NINDS NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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