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Hybrid MR angiography and Fourier velocity imaging using two echo 3D acquisition
Author(s) -
Hou Ping,
Parker Dennis L.,
Blatter Duane D.,
Robison Ronald O.
Publication year - 1991
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.1910190121
Subject(s) - echo (communications protocol) , fourier transform , pulse sequence , nuclear magnetic resonance , artifact (error) , fourier analysis , physics , k space , gradient echo , phase (matter) , pulse (music) , optics , magnetic resonance imaging , computer science , artificial intelligence , radiology , medicine , computer network , quantum mechanics , detector
Fourier velocity imaging can be accomplished without cardiac gating from the second echo of a standard 3D MR angiography sequence. The stepped bipolar velocity encoding gradient is obtained by adding a gradient pulse opposite in area to the spatial phase encoding gradient. In this technique, Fourier images of three spatial coordinates are obtained from the first echo and images of two spatial coordinates and one velocity component are obtained from the second echo. © 1991 Academic Press, Inc.