1. A method comprising: via an information device comprising a graphical user interface, said information device communicatively coupled to a magnetic resonance imaging (MRI) machine: automatically causing a representation of a brain fiber bundle to be rendered, said representation of said brain fiber bundle comprising a plurality of voxels located in an interior region of said brain fiber bundle, each of said plurality of voxels having a negative value of ΔE(x) when ΔE(x) is calculated via: Δ ⁢ ⁢ E ⁡ ( x ) = log ⁢ σ 1 σ 2 + 1 2 ⁢ d 2 ⁡ ( I 1 ⁡ ( x ) , I 0 ⁡ ( x ) ) σ 1 2 - 1 2 ⁢ d 2 ⁡ ( I 2 ⁡ ( x ) , I 0 ⁡ ( x ) ) σ 2 2 +  ∇ d ⁢ I 1 ⁡ ( x )  2 -  ∇ d ⁢ I 2 ⁡ ( x )  2 + Δ ⁢ ⁢ a ⁡ ( x ) where: ΔE(x) is an energy change function; σ 1 is a variance of tensor distances for voxels located in said interior region; σ 2 is a variance of tensor distances for voxels located in an exterior region; I 0 is an initial approximation of a tensor image; I 1 is a tensor image defined in said interior region; I 2 is a tensor image defined in said exterior region; d is a distance measurement between a pair of tensors; ∇ d is an intrinsic gradient under a metric of a tensor image function Δa(x) is a change in surface area caused by promoting a particular voxel to said interior region; and x represents three dimensional coordinates of a point in Euclidean space, the point directly related to said particular voxel.