StND is a method for non-rigid registration of white matter tracts in streamline-space. StND performs two-step registration to align the moving bundle with a static (reference) bundle. In the first step, it affinely registers the two given tracts, and in the second step, it partially deforms the moving bundle to better align it with the static bundle. This partial deformation allows us to improve registration by deforming only areas where there is higher correspondence between streamlines of the tracts. This also helps in preserving the original anatomical structure of the moving bundle.
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