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.
Keywords