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.