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Abstract #3182

Scan Time Reduction in 3D Diffusion-Weighted Steady-State Free Precession Imaging Using Constrained Reconstruction

Rafael O'Halloran1, Florian Knoll2, Kristian Bredies3, Rudolf Stollberger2, Roland Bammer1

1Radiology, Stanford University, Stanford, CA, United States; 2Institute of Medical Engineering, Graz University of Technology, Graz, Austria; 3Department of Mathematics and Scientific Computing, University of Graz, Graz, Austria

3D DTI acquisitions can be lengthy and as the demand for higher-resolution and more encoding directions increases, strategies for reducing scan times will be critical for adoption of these techniques into the clinic. Here undersampled diffusion-weighted SSFP is combined with a TGV2 constrained reconstruction to reduce the scan time by a factor of 4-8. The effect of undersampling on the FA and the direction of the principle eigenvector is investigated and compared to a conventional gridding reconstruction.