Premium
Recovery of phase inconsistencies in continuously moving table extended field of view magnetic resonance imaging acquisitions
Author(s) -
Kruger David G.,
Riederer Stephen J.,
Rossman Phillip J.,
Mostardi Petrice M.,
Madhuranthakam Ananth J.,
Hu Houchun H.
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.20573
Subject(s) - imaging phantom , phase (matter) , artifact (error) , computer science , signal (programming language) , table (database) , sampling (signal processing) , computer vision , nuclear magnetic resonance , plane (geometry) , magnetic resonance imaging , physics , artificial intelligence , optics , mathematics , geometry , quantum mechanics , data mining , programming language , medicine , radiology , filter (signal processing)
MR images formed using extended FOV continuously moving table data acquisition can have signal falloff and loss of lateral spatial resolution at localized, periodic positions along the direction of table motion. In this work we identify the origin of these artifacts and provide a means for correction. The artifacts are due to a mismatch of the phase of signals acquired from contiguous sampling fields of view and are most pronounced when the central k ‐space views are being sampled. Correction can be performed using the phase information from a periodically sampled central view to adjust the phase of all other views of that view cycle, making the net phase uniform across each axial plane. Results from experimental phantom and contrast‐enhanced peripheral MRA studies show that the correction technique substantially eliminates the artifact for a variety of phase encode orders. Magn Reson Med, 2005. © 2005 Wiley‐Liss, Inc.