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Abstract #1852

Analysis of Motion and Eddy Currents with 3D Cones Reordering for Whole-Heart Coronary MR Angiography

Mario O. Malavé1, Nii Okai Addy1, R. Reeve Ingle1, Joseph Y. Cheng1, Corey A. Baron1, and Dwight G. Nishimura1

1Electrical Engineering, Stanford University, Stanford, CA, United States

Motion and eddy current artifacts were investigated with simulations, metric measures, and in vivo scans for three different cone acquisition schemes: sequential, multidimensional golden means (MDGM), and phyllotaxis readout orderings. We demonstrate the idea of using the 3D cones phyllotaxis acquisition method for improved motion behavior and low eddy current susceptibility. Also, the sequential ordering method is shown to be more susceptible to motion artifacts while the MDGM introduces eddy current artifacts. When using the phyllotaxis design, the reconstruction demonstrates that a more spread out k-space traversal per heartbeat is more robust to motion and can be obtained without introducing eddy currents.

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