]>Accurate Anisotropic Fast Marching for Diffusion-Based Geodesic Tractography : Figure 2
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Figure 2: (a) Grid representation of the different sets involved during the fast-marching algorithm. (b) Position of the optimal point on a simplex such as to minimise the geodesic distance to 𝐱 . (c) Geometry of the 48 simplexes surrounding a voxel (central grey dot). The little red dots represent the centres of the 26 neighbouring voxels.