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Abstract #0019

Single-breathhold multiband cine DENSE MRI using novel phase modulation and a self-calibrated slice-low-rank reconstruction

Changyu Sun1, Yu Wang1, and Frederick H. Epstein1,2
1Biomedical Engineering, University of Virginia, Charlottesville, VA, United States, 2Radiology, University of Virginia, Charlottesville, VA, United States


Multiband (MB) excitation of spiral cine DENSE MRI has the potential to provide three-slice coverage in single breathhold with 2D displacement encoding. To acquire three slices in one breathhold of 14 heartbeats, we develop MB3+ phase modulation, and use golden-angle rotation, outer volume suppression and variable flip angle. We extend our recent Cartesian slice-L+S method to develop a non-Cartesian slice-low-rank reconstruction model. DENSE data with MB=3 were acquired in 4 volunteers. The MB3+ DENSE method shows fewer artifacts than CAIPIRINHA and Hadamard encoding phase modulations. The slice-low-rank method with MB+ significantly improves slice separation providing fewer artifacts and signal decay.

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