A semi-local tractography approach using neighborhood information

We present an approach for semi-local fiber tractography on HARDI data extending local tractography by including diffusion information of neighboring regions to reduce accumulation of noise. Considering the neighborhood located behind the current path position we obtain a guiding direction from the previously tracked path. Then, the region in front is explored by determining a set of candidate directions. In addition, we take into account right and left neighbors to observe the position on the fiber bundle perpendicular to the stepping direction and shift the fiber path point toward the center if necessary. Tests are performed on diffusion phantom data.

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