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Ultrafast 2D NMR spectroscopy using sinusoidal gradients: Principles and ex vivo brain investigations
Author(s) -
Sela Noa,
Degani Hadassa,
Frydman Lucio
Publication year - 2004
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20204
Subject(s) - ultrashort pulse , ex vivo , imaging phantom , nuclear magnetic resonance spectroscopy , nuclear magnetic resonance , computer science , spectroscopy , resolution (logic) , train , in vivo , biological system , materials science , physics , optics , artificial intelligence , laser , microbiology and biotechnology , quantum mechanics , biology , cartography , geography
A new methodology capable of delivering complete 2D NMR spectra within a single scan was recently introduced. The resulting potential gain in time resolution could open new opportunities for in vivo spectroscopy, provided that the technical demands of the methodology are satisfied by the corresponding hardware. Foremost among these demands are the relatively short switching times expected from the applied gradient‐echo trains. These rapid transitions may be particularly difficult to accomplish on imaging systems. As a step toward solving this problem, we assessed the possibility of replacing the square‐wave gradient train currently used during the course of the acquisition by a shaped sinusoidal gradient. Examples of the implementation of this protocol are given, and successful ultrafast acquisitions of 2D NMR spectra with suitable spectral widths on a microimaging probe (for both phantom solutions and ex vivo mouse brains) are demonstrated. Magn Reson Med 52:893–897, 2004. © 2004 Wiley‐Liss, Inc.