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Method of generalized projections algorithm for image‐based reduction of artifacts in radial imaging
Author(s) -
Lee K. J.,
Paley M. N. J.,
Griffiths P. D.,
Wild J. M.
Publication year - 2005
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.20554
Subject(s) - reduction (mathematics) , artificial intelligence , computer science , image (mathematics) , algorithm , computer vision , mathematics , geometry
This work describes the method of generalized projections (MGP) as an image‐based, postprocessing method to correct for phase inconsistencies caused by echo misalignments in radial imaging. Computer simulations show that MGP can correct for echo shifts, constant phase, and amplitude errors, but the accuracy of the correction is limited, and this accuracy is reduced by the addition of more degrees of freedom. In phantom experiments, MGP performed better than magnitude filtered backprojection and anti‐parallel projections correction. Magn Reson Med 54:246–250, 2005. © 2005 Wiley‐Liss, Inc.