Hi all, I have calculated some DTI images of the eigen vectors and eigen values of the diffusion tensor, using some DTI scans. In other words I have 3 DTI images for the eigenvalues (one image for each eigenvalue) and 9 images for the eigen vectors (3 images per vector, 1 image for each coordinate of the vector). I am trying to register these calculated images with MNI (or Talairach) space. It is obvious that for eigenvalues images I can use FLIRT, since these images are comprised of scalar quantities. What about the eigenvectors images? Do you think that I can use FLIRT? Will the interpolation (that makes sense for scalar quantities) work for the vectors? Thank you in advance, Stamatis