MRI WITH REMOVAL OF FIELD INHOMOGENEITY ARTIFACTS

摘要

Artifacts in magnetic resonance imaging are removed by a third Fourier transform step that discriminates image data affected by susceptibility induced biasing differences applicable to particular voxels in a sample slice. The third Fourier transform effectively collects data on the affected voxels as if they were displaced along the slice selection Z or B0 axis, thereby collecting the data applicable to the slice regardless of biasing inhomogeneities. The spatial record representing the image of the slice is integrated together with one or more additional frames incrementally spaced along the Z axis. In this manner, image data displaced by inhomogeneities of biasing due to susceptibility variations of tissues, organs, openings or sinuses and the sample periphery, is associated together, providing a substantially artifact free image of the slice.