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Fast magnetic resonance coronary angiography with a three-dimensional stack of spirals trajectory
Journal article   Peer reviewed

Fast magnetic resonance coronary angiography with a three-dimensional stack of spirals trajectory

Daniel R Thedens, Pablo Irarrazaval, Todd S Sachs, Craig H Meyer and Dwight G Nishimura
Magnetic resonance in medicine, Vol.41(6), pp.1170-1179
06/1999
DOI: 10.1002/(SICI)1522-2594(199906)41:6<1170::AID-MRM13>3.0.CO;2-J

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Abstract

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.
 coronary angiography imaging spiral trajectories three-dimensional

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