RegSeg is a simultaneous segmentation and registration method that uses active contours without edges (ACWE) extracted from structural images. The contours evolve through a free-form deformation field supported by the B-spline basis to optimally map the contours onto the data in the target space.
Fix the output of elastix, that writes vtk files in format 2.0 and pixel coordinates are double to format 1.0 and pixel coordinates in float.