Electronic Posters: Cardiovascular

3788. Noncontrast MRA Using Spiral Refocused Turbo Spin Echo

Samuel W. Fielden¹, Hao Tan¹, John P. Mugler III^1,2, Christopher M. Kramer^2,3, Craig H. Meyer<sup>1,2

1</sup>Biomedical Engineering, University of Virginia, Charlottesville, VA, United States; ²Radiology, University of Virginia, Charlottesville, VA, United States; ³Medicine, University of Virginia, Charlottesville, VA, United States

rTSE hybridizes the increased signal provided by the 180° refocusing RF pulses of RARE and the better flow performance of the fully-refocused gradients and phase alternation of balanced SSFP. Here, we apply the principles of rTSE with spiral readout gradients in order to improve the data acquisition efficiency of the sequence while increasing the echo spacing to provide improved artery-vein contrast.