We are currently attempting to check the FA registration of each subject within an MS study group using the following command:

tkregister2 --s fsaverage --surf white --reg /Volumes/Data/magnims/group_study/P??-??/dti_analysis/fa-tal.nii.reg --mov /Volumes/Data/magnims/group_study/P??-??/dti_analysis/fa-tal.nii

However, this generates the following error message despite there being an orig.mgz in the fsaverage directory: ERROR: could not find orig as either mgz or COR

Any ideas on what the problem might be? Thanks Damian

Dr Damian Jenkins Department of Clinical Neurology Oxford University