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.
Keywords