Very Low Current Detection in MRI: Some Limitations

Carlos Ernesto Garrido Salmon¹, Danilo Maziero¹

In this study we model the magnitude and phase effect of one metallic wire with/without current inside an infinite medium during a single EPI sequence. We carry out an experimental comparison of the MR signal obtained in two solutions with the same magnetic permeability but different viscosities. The wire position inside the voxel and the mechanical properties of the medium have a strong influence in the magnitude and phase of the MRI signal in an in vitro ncMRI experiment. We conclude that mechanical effect could be dominant in very low current and low viscosity phantoms.