Rapid Slice-By-Slice Calculation of Susceptibility-Induced B0 Map in the Fourier Domain

Seung-Kyun Lee¹, Ileana Hancu¹

We demonstrate a 2D Fourier-based method to rapidly calculate susceptibility-induced B0 inhomogeneity in individual slices. Compared to the 3D Fourier method, this method has dramatically reduced computer memory requirement and attains comparable speed of calculation when B0 map is desired in a small number of slices, as is often the case in automatic shim decision. The method is applied to calculation of susceptibility-induced B0 field in an axial bilateral breast slice based on susceptibility-segmented 3D anatomical image of a female volunteer.