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Abstract #0614

Improving Water-Fat Separation Using Object-Based Information of the B0 Field Inhomogeneity

Samir D. Sharma 1 , Nathan S. Artz 1 , Diego Hernando 1 , Debra E. Horng 1,2 , and Scott B. Reeder 1,2

1 Radiology, University of Wisconsin - Madison, Madison, WI, United States, 2 Medical Physics, University of Wisconsin - Madison, Madison, WI, United States

The primary challenge in water-fat separation lies in estimating the B0 field map, which is composed of the background field and susceptibility-induced field. The susceptibility-induced field can be estimated if the susceptibility distribution is known or can be approximated. In this work, the susceptibility distribution is approximated from the source images using the known susceptibility values of tissue and air. This object-based information is then used to improve the robustness to swaps for existing water-fat separation methods. Cases are shown in which water-fat swaps were avoided by using the object-based information of the B0 field map.

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