Figure 4.
Reconstructing smooth streamlines within a volume of interest. Probabilistic tractography yields a connectivity distribution (black), which is volume density of the number of streamlines that pass through each voxel in space. A weighted smoothing spline (red) was fitted to the centers of the non-zero voxels in the connectivity distribution, and bounding ellipses (green) were used to define the boundaries of an elliptical fiber bundle.
