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research article

In vivo 1H NMR spectroscopy of the human brain at 7 T

Tkac, I.
•
Andersen, P.
•
Adriany, G.
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2001
Magnetic Resonance in Medicine

In vivo 1H NMR spectra from the human brain were measured at 7 T. Ultrashort echo-time STEAM was used to minimize J-modulation and signal attenuation caused by the shorter T2 of metabolites. Precise adjustment of higher-order shims, which was achieved with FASTMAP, was crucial to benefit from this high magnetic field. Sensitivity improvements were evident from single-shot spectra and from the direct detection of glucose at 5.23 ppm in 8-ml volumes. The linewidth of the creatine methyl resonance was at best 9 Hz. In spite of the increased linewidth of singlet resonances at 7 T, the ability to resolve overlapping multiplets of J-coupled spin systems, such as glutamine and glutamate, was substantially increased. Characteristic spectral patterns of metabolites, e.g., myo-inositol and taurine, were discernible in the in vivo spectra, which facilitated an unambiguous signal assignment. © 2001 Wiley-Liss, Inc.

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Type
research article
DOI
10.1002/mrm.1213
Author(s)
Tkac, I.
Andersen, P.
Adriany, G.
Merkle, H.
Uurbil, K.
Gruetter, R.  
Date Issued

2001

Publisher

Wiley

Published in
Magnetic Resonance in Medicine
Volume

46

Issue

3

Start page

451

End page

456

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LIFMET  
Available on Infoscience
May 27, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/80906
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