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A new acquisition mode for 2D inflow refreshment angiography
Author(s) -
Doyle Mark,
Matsuda Tetsuya,
Pohost Gerald M.
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.1910180107
Subject(s) - angiography , signal (programming language) , projection (relational algebra) , contrast (vision) , computer science , volume (thermodynamics) , sensitivity (control systems) , computer vision , artificial intelligence , nuclear magnetic resonance , biomedical engineering , physics , nuclear medicine , radiology , medicine , algorithm , quantum mechanics , electronic engineering , engineering , programming language
Abstract Time‐of‐flight angiography methods rely on blood/tissue contrast generated when fresh blood spins enter a partially saturated region. A series of projective angiographic views is generated by application of a maximum intensity projection algorithm to data acquired from a 3D volume. When the data are acquired as a set of 2D slices, the angiograms exhibit sensitivity to body motion, resulting in the generation of artifacts. We present a new 2D time‐of‐flight angiographic technique, STREAM, Suppressed Tissue with Refreshment Angiography Method. It exhibits low sensitivity to internal body motion, thus allowing acquisition of good quality, single average angiograms. To suppress the static tissue signal a unique “active” suppression strategy is employed. Additionally, to further suppress the lipid signal, the chemical‐shift phenomenon is exploited in the STREAM sequence. © 1991 Academic Press. Inc.