Meeting Banner
Abstract #0612

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

Seung-Kyun Lee1, Ileana Hancu1

1GE Global Research, Niskayuna, NY, United States

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.

Keywords

advantage agreement allow allows anatomy applied applying attains avoid avoided axial background belly body brain breast breath buffer calculation clear comp contiguous contributed deal defining delta desired distant domain done dotted double efficiency efficient error example extension fact field flexibility form function gain gigabyte gives global good grant healthy held highly homogeneous human idea ideal implied indicates induced integral introduce isotropic laptop letter lies long lung mapping maps marques matrices matrix meed memory metallic middle model much nature neck offset often pair patient phys plot polar produce produced proposed provision quantity rapid replaced replica resolution respect segmented shim simple slice slices solid speed sphere subject substantially supported susceptibility takes terms tissue torso transform turns type uniform upper useful validation variables visible volume volumes volunteer water woman