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Optimization of ECG‐triggered 3D 23 Na MRI of the human heart
Author(s) -
Pabst Thomas,
Sandstede Joern,
Beer Meinrad,
Kenn Werner,
Greiser Andreas,
von Kienlin Markus,
Neubauer Stefan,
Hahn Dietbert
Publication year - 2001
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 - 10.1002/1522-2594(200101)45:1<164::aid-mrm1022>3.0.co;2-s
Subject(s) - signal (programming language) , human heart , magnetic resonance imaging , gradient echo , medicine , high resolution , signal averaging , signal to noise ratio (imaging) , noise (video) , scanner , nuclear magnetic resonance , nuclear medicine , biomedical engineering , cardiology , radiology , physics , computer science , artificial intelligence , remote sensing , signal transfer function , digital signal processing , analog signal , image (mathematics) , programming language , geology , computer hardware , optics
23 Na MRI may allow distinction of normal and ischemically injured myocardium. The aim of this study was to optimize 23 Na MRI of the human heart by improvement of spatial resolution and ECG‐triggering and to measure the signal/noise of blood and myocardium and the myocardium/blood signal ratios in a volunteer study. A spoiled gradient echo sequence was developed on a 1.5T scanner equipped with a 23 Na heart surface coil. 3D short axis ECG‐triggered 23 Na MRI was performed in 10 healthy subjects. The signal/noise of myocardium and blood were 8.2 ± 0.7 and 18.3 ± 1.3, respectively, signal ratio myocardium/blood was 0.44 ± 0.03. This value is in good agreement with the theoretical value of 0.45. ECG gated 3D 23 Na MRI of the human heart is feasible with sufficient spatial resolution and signal/noise ratio. Magn Reson Med 45:164–166, 2001. © 2001 Wiley‐Liss, Inc.