Hi - You can use avscale to extract the parameters from the matrix (translation,rotation,scaling,etc.) Cheers, Saad. On 21 Dec 2006, at 00:54, Tal Herbsman wrote: > Can someone send me the format of the 4x4 affine transform matrix > generated > by eddy_correct. I'm interested in extracting the rotation angles > from this > matrix. > > Thanks, > Tal. > > > ---------------- > > Tal Herbsman, MD > MUSC - Charleston, SC ------------------------------------------------------------------------ --- Saad Jbabdi, Postdoctoral Research Assistant, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222545 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~saad ------------------------------------------------------------------------ ---