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Fast, three‐dimensional free‐breathing MR imaging of myocardial infarction: A feasibility study
Author(s) -
Saranathan Manojkumar,
Rochitte Carlos E.,
Foo Thomas K.F.
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.20061
Subject(s) - gradient echo , nuclear medicine , magnetic resonance imaging , medicine , myocardial infarction , nuclear magnetic resonance , biomedical engineering , computer science , physics , radiology , cardiology
Imaging delayed hyperenhancement of myocardial infarction is most commonly performed using an inversion recovery (IR) prepared 2D breathhold segmented k ‐space gradient echo (FGRE) sequence. Since only one slice is acquired per breathhold in this technique, 12–16 successive breathholds are required for complete anatomical coverage of the heart. This prolongs the overall scan time and may be exhausting for patients. A navigator‐echo gated, free‐breathing, 3D FGRE sequence is proposed that can be used to acquire a single slab covering the entire heart with high spatial resolution. The use of a new variable sampling in time (VAST) acquisition scheme enables the entire 3D volume to be acquired in 1.5–2 min, minimizing artifacts from bulk motion and diaphragmatic drift and contrast variations due to contrast media washout. Magn Reson Med 51:1055–1060, 2004. © 2004 Wiley‐Liss, Inc.