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Detection and elimination of motion artifacts by regeneration of k ‐space
Author(s) -
Bydder M.,
Larkman D.J.,
Hajnal J.V.
Publication year - 2002
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.10093
Subject(s) - imaging phantom , artifact (error) , sensitivity (control systems) , computer science , electromagnetic coil , noise (video) , signal (programming language) , k space , motion (physics) , signal to noise ratio (imaging) , artificial intelligence , computer vision , space (punctuation) , algorithm , nuclear magnetic resonance , pattern recognition (psychology) , magnetic resonance imaging , physics , optics , image (mathematics) , radiology , medicine , telecommunications , electronic engineering , quantum mechanics , programming language , engineering , operating system
A method has been developed using techniques from partially parallel imaging (PPI) to detect localized inconsistencies in k ‐space that are caused by certain types of motion. The inconsistent data are discarded and consistent data regenerated from the remaining data using PPI techniques. The price is a small decrease in signal‐to‐noise ratio (SNR) and additional postprocessing. An iterative scheme is presented which does not require separately acquired coil sensitivity information for the PPI reconstructions. This method has been found to reduce artifact levels in phantom and in vivo test studies. Magn Reson Med 47:677–686, 2002. © 2002 Wiley‐Liss, Inc.