Stephen J. Dodd1,
1Laboratory of Functional
& Molecular Imaging, NINDS, National Institutes of Health,
The contrast from micron size magnetic particles is dependent on the position within a voxel under certain imaging conditions. It is shown that the contrast maybe adjusted and improved with application of linear phase ramps in k-space to give sub-voxel image shifts. This technique will provide improved quantification of particle distributions for cell tracking experiments.