Johan Berglund1, Hkan Ahlstrm1, Lars Johansson1, Joel Kullberg1
1Department of radiology,
A post processing method is presented, that separates water and fat from a single complex image. Initially, each voxel is assumed to be either water- or fat dominant, giving two alternative field heterogeneity phasors. Spatial smoothness of the field map is imposed by formulating an optimization problem, which is solved approximately using a multiscale belief propagation algorithm. Smoothing of the field map relaxes the initial assumption of water- or fat dominance. Water and fat signals are found analytically in each voxel. Initial results from abdomen and whole-body datasets at 1.5 T and 3.0 T were found promising.