Improvements in Quantitative Magnetic Susceptibility Mapping at Using Additional Low Resolution Scans

Maarten J. Versluis^1,2, Matthias J.P. van Osch^1,2, Mark A. van Buchem^1,2, Andrew G. Webb^1,2

Phase images measured with gradient echo sequences are sensitive to changes in the local magnetic field and can be used to identify regions with different magnetic susceptibilities. We have used the Fourier based relation between phase and susceptibility to calculate susceptibility maps. Simulations of phase maps showed improvements of susceptibility maps by combining high and low resolution data with different orientations to the magnetic field. Preliminary results of in-vivo data showed that artifacts in magnetic susceptibility maps can be reduced considerably using this approach.