Proton T1 relaxation times of metabolites in human occipital white and gray matter at 7 T.

Détails

ID Serval
serval:BIB_7A3EFEFC26B3
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Proton T1 relaxation times of metabolites in human occipital white and gray matter at 7 T.
Périodique
Magnetic Resonance in Medicine
Auteur⸱e⸱s
Xin L., Schaller B., Mlynarik V., Lu H., Gruetter R.
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Statut éditorial
Publié
Date de publication
2013
Volume
69
Numéro
4
Pages
931-936
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
Proton T1 relaxation times of metabolites in the human brain have not previously been published at 7 T. In this study, T1 values of CH3 and CH2 group of N-acetylaspartate and total creatine as well as nine other brain metabolites were measured in occipital white matter and gray matter at 7 T using an inversion-recovery technique combined with a newly implemented semi-adiabatic spin-echo full-intensity acquired localized spectroscopy sequence (echo time = 12 ms). The mean T1 values of metabolites in occipital white matter and gray matter ranged from 0.9 to 2.2 s. Among them, the T1 of glutathione, scyllo-inositol, taurine, phosphorylethanolamine, and N-acetylaspartylglutamate were determined for the first time in the human brain. Significant differences in T1 between white matter and gray matter were found for water (-28%), total choline (-14%), N-acetylaspartylglutamate (-29%), N-acetylaspartate (+4%), and glutamate (+8%). An increasing trend in T1 was observed when compared with previously reported values of N-acetylaspartate (CH3 ), total creatine (CH3 ), and total choline at 3 T. However, for N-acetylaspartate (CH3 ), total creatine, and total choline, no substantial differences compared to previously reported values at 9.4 T were discernible. The T1 values reported here will be useful for the quantification of metabolites and signal-to-noise optimization in human brain at 7 T. Magn Reson Med 69:931-936, 2013. © 2012 Wiley Periodicals, Inc.
Mots-clé
T1 relaxation time, human brain, metabolites, occipital lobe, white matter, gray matter, 7 T
Pubmed
Web of science
Open Access
Oui
Création de la notice
29/04/2013 10:41
Dernière modification de la notice
20/08/2019 15:36
Données d'usage