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Echo‐planar imaging with asymmetric gradient modulation and inner‐volume excitation
Author(s) -
Feinberg David A.,
Turner Robert,
Jakab Peter D.,
Kienlin Markus Von
Publication year - 1990
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.1910130116
Subject(s) - excitation , nuclear magnetic resonance , echo planar imaging , volume (thermodynamics) , echo (communications protocol) , planar , gradient echo , modulation (music) , materials science , magnetic resonance imaging , optics , physics , acoustics , computer science , radiology , medicine , computer network , computer graphics (images) , quantum mechanics
Abstract Single‐shot echo‐planar imaging is notoriously vulnerable to image artifacts, arising from the necessity of alternate echo time reversal during image reconstruction and from static field inhomogeneity. A technique for overcoming these problems, which further permits imaging on systems with relatively poor gradient waveforms, when data are collected always with the same gradient polarity, is presented. Subsectional and 3D volume imaging are presented as well as a novel phase‐correction method for Hermitian symmetry in “half‐Fourier” echo‐planar imaging.