Spectroscopic imaging with volume selection by unpaired adiabatic pi pulses: Theory and application.

Spectroscopic imaging with volume selection by unpaired adiabatic pi pulses: Theory and application. Research Abstract Details 

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Spectroscopic imaging with volume selection by unpaired adiabatic pi pulses: Theory and application. Abstract Text:

Julien Valette,Jang-Yeon Park,Olli ,K?mil U?urbil,Michael Garwood,Pierre-Gilles Henry,Julien Valette,Jang-Yeon Park,Olli ,K?mil U?urbil,Michael Garwood,Pierre-Gilles Henry,Julien Valette,Jang-Yeon Park,Olli ,K?mil U?urbil,Michael Garwood,Pierre-Gilles Henry,

In NMR spectroscopy, volume selection can be advantageously achieved using adiabatic pi pulses, which enable high bandwidth and B(1) insensitivity. In order to avoid the generation of non-linear phase profiles and the subsequent signal loss caused by incoherent averaging, adiabatic pi pulses are usually used in pairs for volume selection in each spatial dimension. Alternatively, when performing spectroscopic imaging (SI), a high enough spatial resolution results in negligible phase dispersion within each pixel. This allows using only one pulse per selected spatial dimension, resulting in a reduced echo-time and reduced power deposition. In this work, the feasibility of such an approach is explored theoretically and numerically, allowing the derivation of explicit conditions to obtain SI images without artifact. Adequate spatial and spectral post-processing procedures are described to compensate for the effect of non-linear phase profiles. These developments are applied to SI in the rat brain at 9.4T, using a new adiabatic sequence named Pseudo-LASER.

Spectroscopic imaging with volume selection by unpaired adiabatic pi pulses: Theory and application. Publishing Authors By Initials

J Valette,JY Park,O ,K U?urbil,M Garwood,PG Henry,J Valette,JY Park,O ,K U?urbil,M Garwood,PG Henry,J Valette,JY Park,O ,K U?urbil,M Garwood,PG Henry,

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Spectroscopic imaging with volume selection by unpaired adiabatic pi pulses: Theory and application. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of magnetic resonance (San Diego, Calif. :

VOLUME: 189

Page Numbers: 1-12

Journal Abbreviation: J. Magn. Reson.

ISSN: 1090-7807

DAY: 24

MONTH: 08

YEAR: 2007

Spectroscopic imaging with volume selection by unpaired adiabatic pi pulses: Theory and application. Information

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LANGUAGE: eng

NlmUniqueID: 9707935

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Grant and Affiliation Information for Spectroscopic imaging with volume selection by unpaired adiabatic pi pulses: Theory and application.

AFFILIATION: Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, 2021 Sixth Street SE, Minneapolis, MN 55455, USA.

Country: United States

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MEDLINETA: J Magn Reson

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