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Artifact suppression in imaging of myocardial infarction using B 1 ‐weighted phased‐array combined phase‐sensitive inversion recovery †
Author(s) -
Kellman Peter,
Dyke Christopher K.,
Aletras Anthony H.,
McVeigh Elliot R.,
Arai Andrew E.
Publication year - 2004
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.10689
Subject(s) - phased array , artifact (error) , fluid attenuated inversion recovery , electromagnetic coil , physics , nuclear magnetic resonance , sensitivity (control systems) , signal (programming language) , computer science , nuclear medicine , magnetic resonance imaging , artificial intelligence , medicine , radiology , telecommunications , electronic engineering , programming language , quantum mechanics , antenna (radio) , engineering
Regions of the body with long T 1 , such as cerebrospinal fluid (CSF), may create ghost artifacts on gadolinium‐hyperenhanced images of myocardial infarction when inversion recovery (IR) sequences are used with a segmented acquisition. Oscillations in the transient approach to steady state for regions with long T 1 may cause ghosts, with the number of ghosts being equal to the number of segments. B 1 ‐weighted phased‐array combining provides an inherent degree of ghost artifact suppression because the ghost artifact is weighted less than the desired signal intensity by the coil sensitivity profiles. Example images are shown that illustrate the suppression of CSF ghost artifacts by the use of B 1 ‐weighted phased‐array combining of multiple receiver coils. Magn Reson Med 51:408–412, 2004. Published 2004 Wiley‐Liss, Inc.