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Phase‐correction method for reduction of B 0 instability artifacts
Author(s) -
Foo Thomas K. F.,
Hayes Cecil E.
Publication year - 1993
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.1880030420
Subject(s) - instability , reduction (mathematics) , intensity (physics) , phase (matter) , computer science , object (grammar) , space (punctuation) , phase space , k space , set (abstract data type) , noise (video) , noise reduction , signal (programming language) , computer vision , algorithm , spatial frequency , artificial intelligence , image (mathematics) , physics , optics , mathematics , mathematical analysis , geometry , fourier transform , quantum mechanics , mechanics , thermodynamics , programming language , operating system
View‐to‐view phase shifts due to B0 instability are corrected by applying a phase correction to the low‐spatial‐frequency views. The algorithm described herein assumes that the signal intensity in the space outside of an object represents only noise. A set of phases for the low‐spatial‐frequency views are calculated by minimizing, in the image, the intensity of the induced artifacts in the space outside of the object.