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Reduction of susceptibility artifact in gradient‐echo imaging
Author(s) -
Cho Z. H.,
Ro Y. M.
Publication year - 1992
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.1910230120
Subject(s) - artifact (error) , quantitative susceptibility mapping , nuclear magnetic resonance , gradient echo , spin echo , voxel , magnetic susceptibility , signal (programming language) , pulse (music) , computer science , pulse sequence , materials science , physics , magnetic resonance imaging , artificial intelligence , optics , condensed matter physics , medicine , radiology , detector , programming language
A new technique with which susceptibility artifact in gradient‐echo imaging can be reduced substantially by use of a tailored RF pulse is described. The proposed technique can ideally be applied to the case where high local magnetic field inhomogeneity is dominated by the susceptibility. The signal loss and void phenomena due to susceptibility in a voxel are studied and a correction method is also proposed. The description of the tailored RF pulse and its proposed application are given and experimental results obtained using a human volunteer with a 2.0‐T KAIS NMR system are presented. © 1992 Academic Press, Inc.