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Evaluation of coronary artery bypass grafts by magnetic resonance imaging
Author(s) -
Langerak Susan E.,
Kunz Patrik,
de Roos Albert,
Vliegen Hubert W.,
van der Wall Ernst E.
Publication year - 1999
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/(sici)1522-2586(199909)10:3<434::aid-jmri27>3.0.co;2-g
Subject(s) - medicine , stenosis , magnetic resonance angiography , radiology , angiography , magnetic resonance imaging , artery , conventional angiography , phase contrast microscopy , derivation , cardiology , physics , optics
Magnetic resonance (MR) angiography and flow mapping have the potential to become a major noninvasive diagnostic tool for the assessment of coronary artery bypass graft morphology and function. Several MR sequences, such as conventional non‐respiratory compensated methods, and phase contrast cine flow sequences have been reported for the evaluation of bypass graft patency. However the visualization of different graft segments and the detection of graft stenosis remains difficult. Recent advances in MR coronary angiography and flow mapping are volume coronary angiongraphy with targeted scans, navigator gated angiography, contrast‐enhanced angiography, and breath‐hold or navigator gated flow sequences. Future approaches, such as navigator gated fast MR techniques resulting in high‐resolution angiography in combination with breath‐hold MR flow mapping with high temporal resolution, might allow a comprehensive evaluation of bypass graft stenosis and function. This review article will address the major issues concerning the MR evaluation of bypass grafts. J. Magn. Reson. Imaging 1999;10:434–441. © 1999 Wiley‐Liss, Inc.