Localized short-echo-time proton MR spectroscopy with full signal-intensity acquisition.

Détails

ID Serval
serval:BIB_9C764735F729
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Localized short-echo-time proton MR spectroscopy with full signal-intensity acquisition.
Périodique
Magnetic Resonance in Medicine
Auteur⸱e⸱s
Mlynárik V., Gambarota G., Frenkel H., Gruetter R.
ISSN
0740-3194 (Print)
ISSN-L
0740-3194
Statut éditorial
Publié
Date de publication
2006
Volume
56
Numéro
5
Pages
965-970
Langue
anglais
Notes
Publication types: Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
We developed a short-echo-time (TE) sequence for proton localized spectroscopy by combining a 1D add-subtract scheme with a doubly slice-selective spin-echo (SE) sequence. The sequence preserves the full magnetization available from the selected volume of interest (VOI). By reducing the number of radiofrequency (RF) pulses acting on transverse magnetization, we were able to minimize the TE to the level that is achievable with the stimulated echo acquisition mode (STEAM) technique, and also gained a twofold increase in sensitivity. The use of an adiabatic pulse in the add-subtract localization improved the efficiency of excitation in spatially inhomogeneous RF fields, which are frequently encountered at high magnetic fields. The localization performance and sensitivity gains of this method, which is termed SPin ECho, full Intensity Acquired Localized (SPECIAL) spectroscopy, were demonstrated in vivo in rat brains. In conjunction with spectroscopic imaging, a 2-microl spatial resolution was accomplished with a signal-to-noise ratio (SNR) above 30, which is usually sufficient for reliable quantification of a large number of metabolites (neurochemical profile).
Mots-clé
Algorithms, Animals, Brain/metabolism, Magnetic Resonance Spectroscopy/methods, Male, Nerve Tissue Proteins/analysis, Neurotransmitter Agents/analysis, Protons/diagnostic use, Rats, Rats, Sprague-Dawley, Reproducibility of Results, Sensitivity and Specificity
Pubmed
Web of science
Open Access
Oui
Création de la notice
04/08/2010 16:28
Dernière modification de la notice
20/08/2019 16:03
Données d'usage