1. An imaging method for imaging a subject including anisotropic structures, the method comprising: acquiring a three-dimensional apparent diffusion tensor map of at least a portion of the subject including at least some anisotropic structures; processing the apparent diffusion tensor at a voxel to obtain eigenvectors and eigenvalues; extracting a three-dimensional fiber representation using the eigenvectors and eigenvalues; during the extracting, locally interpolating voxels in at least a selected dimension in a vicinity of the fiber representation, the interpolating including weighting the interpolated voxels by a parameter indicative of a local anisotropy, the interpolating resulting in a three-dimensional fiber representation having a higher resolution than the acquired tensor map; and producing a human-viewable display of the three-dimensional fiber representation.