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  4. In vivo H-1 NMR measurement of glycine in rat brain at 9.4 T at short echo time
 
research article

In vivo H-1 NMR measurement of glycine in rat brain at 9.4 T at short echo time

Gambarota, Giulio
•
Xin, Lijing  
•
Perazzolo, Chiara
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2008
Magnetic Resonance in Medicine

Glycine is an amino acid present in mammalian brain, where it acts as an inhibitory and excitatory neurotransmitter. The two detectable protons of glycine give rise to a singlet at 3.55 ppm that overlaps with the more intense myo-inositol resonances, and its measurement has traditionally required specific editing efforts. The aim of the current study was to reduce the signal intensity of myo-inositol relative to that of glycine by exploiting the fast signal J-evolution of the myo-inositol spin system when using a single spin-echo localization method we recently introduced. Glycine was detected at TE = 20 ms with an average Cramer-Rao lower bound (CRLB) of 8.6% +/- 1.5% in rat brain (N = 5), at 9.4 T. The concentration of glycine was determined using LCModel analysis at 1.1 +/- 0.1 mM, in good agreement with biochemical measurements previously reported. We conclude that at high magnetic fields, glycine can be measured at a relatively short echo time (TE) without additional editing efforts.

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Type
research article
DOI
10.1002/mrm.21695
Web of Science ID

WOS:000259053900026

Author(s)
Gambarota, Giulio
Xin, Lijing  
Perazzolo, Chiara
Kohler, Ingrid
Mlynarik, Vladimir  
Gruetter, Rolf  
Date Issued

2008

Publisher

Wiley-Blackwell

Published in
Magnetic Resonance in Medicine
Volume

60

Start page

727

End page

731

Subjects

glycine

•

strongly coupled spin system

•

NMR spectroscopy

•

density matrix simulations

•

rat brain

•

Magnetic-Resonance-Spectroscopy

•

Free Amino Acids

•

Spin Systems

•

Spectra

•

Schizophrenia

•

Metabolites

•

Sequences

•

Vitro

•

CIBM-AIT

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CIBM  
LIFMET  
Available on Infoscience
November 30, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/61049
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