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Fast magnetic resonance coronary angiography with a three‐dimensional stack of spirals trajectory
Author(s) -
Thedens Daniel R.,
Irarrazaval Pablo,
Sachs Todd S.,
Meyer Craig H.,
Nishimura Dwight G.
Publication year - 1999
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/(sici)1522-2594(199906)41:6<1170::aid-mrm13>3.0.co;2-j
Subject(s) - spiral (railway) , magnetic resonance imaging , magnetic resonance angiography , k space , coronary vessel , traverse , image quality , materials science , computer science , biomedical engineering , nuclear magnetic resonance , physics , computer vision , radiology , mathematics , medicine , geology , mathematical analysis , blood flow , geodesy , image (mathematics)
In this work, three‐dimensional (3D) spiral imaging has been utilized for magnetic resonance coronary angiography. Spiral‐based 3D techniques can dramatically reduce imaging time requirements compared with 3D Fourier Transform imaging. The method developed here utilized a “stack of spirals” trajectory, to traverse 3D k‐space rapidly. Both thick‐slab volumes encompassing the entire coronary tree with isotropic resolution and thin‐slab volumes targeted to a particular vessel of interest were acquired. Respiratory compensation was achieved using the diminishing variance algorithm. T2‐prepared contrast was also applied in some cases to improve contrast between vessel and myocardium, while off‐resonance blurring was minimized by applying a linear correction to the acquired data. Images from healthy volunteers were displayed using a curved reformatting technique to view long segments of vessel in a single projection. The results demonstrate that this 3D spiral technique is capable of producing high‐quality coronary magnetic resonance angiograms. Magn Reson Med 41:1170–1179, 1999. © 1999 Wiley‐Liss, Inc.