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Simultaneous acquisition of phase‐contrast angiograms and stationary‐tissue images with Hadamard encoding of flow‐induced phase shifts
Author(s) -
Dumoulin Charles L.,
Souza Steven P.,
Darrow Robert D.,
Pelc Norbert J.,
Adams William J.,
Ash Stephen A.
Publication year - 1991
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.1880010403
Subject(s) - hadamard transform , phase contrast microscopy , encoding (memory) , contrast (vision) , phase (matter) , computer science , offset (computer science) , flow (mathematics) , phase contrast imaging , computer vision , biomedical engineering , nuclear magnetic resonance , optics , artificial intelligence , physics , mathematics , medicine , mathematical analysis , quantum mechanics , programming language , mechanics
A technique for the simultaneous acquisition of three‐dimensional phase‐contrast angiograms and stationary‐tissue images is described. Hadamard multiplexed encoding of flow information permits image acquisition times that are a third shorter than those of previous phase‐contrast methods. The encoding scheme described also enables differentiation of flow‐induced phase shifts from phase shifts due to resonance offset conditions such as field inhomogeneities and chemical shift. Display strategies that combine this phase information with the flow image are described.