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Abstract #3278

Analytical Three-Point Dixon Method Using a Global Graph Cut

Jonathan Andersson1, Filip Malmberg1, Håkan Ahlström1, and Joel Kullberg1

1Radiology, Uppsala University, Uppsala, Sweden

When reconstructing chemical shift encoded water-fat images so called water-fat swaps due to incorrect phase maps can be a significant problem, limiting clinical assessment and quantitative measurements. A method is presented for solving the problem in the case of 3 echoes, assuming only a fix intra-echo spacing. Two possible solutions are analytically calculated for each voxel. The correct global solution is then found using a graph-cut method. The method succeeds where a region-growing reference method fails at low SNR. The presented method runs quickly and uses only one parameter that can be set automatically, which should allow for online implementation.

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