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Myocardial wall tagging with undersampled projection reconstruction †
Author(s) -
Peters Dana C.,
Epstein Frederick H.,
McVeigh Elliot R.
Publication year - 2001
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.1076
Subject(s) - undersampling , computer science , artifact (error) , artificial intelligence , computer vision , projection (relational algebra) , context (archaeology) , fourier transform , image resolution , pixel , iterative reconstruction , algorithm , physics , geology , paleontology , quantum mechanics
Azimuthally undersampled projection reconstruction (PR) acquisition is investigated for use in myocardial wall tagging with MR using grid tags to provide increased temporal and spatial resolution. PR can provide the high‐resolution images required for tagging with very few projections, at the expense of artifact. Insight is provided into the PR undersampling artifact, in the context of measuring myocardial motion with tags. For Fourier transform imaging, at least 112 phase‐encodings must be collected to image tagging grids spaced 7 pixels apart. PR requires about 80 projections, a 1.4‐fold reduction in scan time. Magn Reson Med 45:562–567, 2001. Published 2001 Wiley‐Liss, Inc.