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Asymmetric spin‐echo imaging of magnetically inhomogeneous systems: Theory, experiment, and numerical studies
Author(s) -
Stables Lara A.,
Kennan Richard P.,
Gore John C.
Publication year - 1998
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.1910400314
Subject(s) - spin echo , echo (communications protocol) , signal (programming language) , physics , contrast (vision) , pulse sequence , spin (aerodynamics) , pulse (music) , nuclear magnetic resonance , magnetic field , range (aeronautics) , field (mathematics) , computational physics , statistical physics , optics , magnetic resonance imaging , materials science , quantum mechanics , computer science , mathematics , computer network , detector , composite material , radiology , programming language , thermodynamics , pure mathematics , medicine
The ability of the asymmetric spin‐echo (ASE) pulse sequence to provide different degrees of spin‐echo (SE)‐type and gradient‐echo (GE)‐type contrast when imaging media containing magnetic inhomogeneities is investigated. The dependence of the ASE signal on the size of magnetic field perturbers is examined using theory, computer simulations, and experiment. A theoretical prediction of the ASE signal is obtained using the Anderson‐Weiss mean field theory, the results of which are qualitatively supported by computer simulations and experimental studies. It is shown that the ASE sequence can be used to tune the range of perturber sizes that provide the largest contributions to susceptibility contrast effects.