Fig. 1.

Two-dimensional (2D) representation of a tracked fascicle segment with the squares representing the voxels in the grid and arrows represent the fascicle orientation in the voxels. The tracking started at p_o in the orientation at v_o to obtain p₁ at a distance of 9 mm from p_o. p₂ Was obtained in the direction of orientation in v₁ and at a distance of 9 mm from p₁. The dotted line represents the 2nd degree fit function. The tracking was performed in a 3-dimensional (3D) grid, and the 2D drawing is for simplicity.