1. A method comprising: receiving data corresponding to an original three-dimensional (3D) reconstructed image into a computing device; smoothing substantially homogenous areas and enhancing edges of the original reconstructed image using edge enhancing diffusion (EED) to create edge-enhanced image data; calculating a structural importance map, wherein calculating the structural importance map includes calculating a measure of structural importance for voxels of data in the original reconstructed image, wherein the measure of structural importance is a function of curvature calculated at a voxel; calculating a blurred version of the measure of structural importance for the voxels; and determining a voxel intensity to be used to create a filtered image, wherein the voxel intensity is interpolated, between an intensity of the voxel in the EED image and the intensity of the voxel in the original image, using the measure of structural importance and the blurred measure of structural importance.