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

Details

Serval ID
serval:BIB_9C764735F729
Type
Article: article from journal or magazin.
Collection
Publications
Title
Localized short-echo-time proton MR spectroscopy with full signal-intensity acquisition.
Journal
Magnetic Resonance in Medicine
Author(s)
Mlynárik V., Gambarota G., Frenkel H., Gruetter R.
ISSN
0740-3194 (Print)
ISSN-L
0740-3194
Publication state
Published
Issued date
2006
Volume
56
Number
5
Pages
965-970
Language
english
Notes
Publication types: Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Abstract
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).
Keywords
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
Yes
Create date
04/08/2010 16:28
Last modification date
20/08/2019 16:03
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