Dear Lukas, > Is there any way to get the registration parameters into an ascii file??? Did you mean the 4x4 transformation matrices, or the parameters in terms of translations and translations - e.g as printed out in spm after realignment? If you meant the translations / rotations, I have a simple proram to extract these in matlab, which could be saved to ascii as Stefan described. Please let me know if you would like a copy, and I'll send it to you, Cheers, Matthew %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%