Benjamin K. Felsted1, Ross T. Whitaker1, Matthias C. Schabel2, Edward V.R. DiBella2
1School of Computing, University of Utah, Salt Lake City, UT, United States; 2Department of Radiology, University of Utah, Salt Lake City, UT, United States
Introduction: We extend the model-based reconstruction method with a physically based linear-phase model that can account for gadolinium field distortions. Methods: Both constant- and linear-phase models were used in reconstructing two 4D breast DCE k-space acquisitions, retrospectively undersampled at R-factors of 1, 4, and 8. Results: Image reconstruction errors correlate spatially with dynamic image phase estimation errors. The errors of the constant-phase model grow fastest as R increases. Conclusion: The new extension can reduce most of the error from phase. The reconstructions have full spatial resolution without the blurring, ghosting, and ringing spatial artifacts typically associated with aggressive undersampling.