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Motion artifacts in fast spin‐echo imaging
Author(s) -
Madore Bruno,
Henkelman R. Mark
Publication year - 1994
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880040411
Subject(s) - point spread function , convolution (computer science) , echo (communications protocol) , spin echo , fast spin echo , point (geometry) , motion (physics) , physics , spin (aerodynamics) , nuclear magnetic resonance , computer science , optics , artificial intelligence , magnetic resonance imaging , mathematics , geometry , medicine , computer network , artificial neural network , radiology , thermodynamics
The purpose of this work is to obtain a better understanding of motion artifacts in fast spin‐echo imaging, in order to eventually identify efficient ways of suppressing them. To do so, the point spread function of a moving point was calculated for fast spin‐echo imaging, and experimental data were acquired by imaging a moving liquid sphere with a diameter of 1.5 mm. The agreement of the experimental results with the calculated point spread function is shown to be excellent. It was found that motion artifacts in fast spin‐echo imaging arise from the convolution of two distinct band patterns. One of these patterns may dominate the convolution, giving its own spacing to the resulting image. For other acquisition parameters, the convolution results in an intricate pattern that may appear to lack overall structure.