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Dear Stephen, > I would like to be able to export the first-level contrast images > (cons/COPEs) from an existing SPM8 analysis into FSL so that I can use the > threshold-free cluster enhancement (TFCE) implemented in FSL's randomise > routine. > What would be the best way to do this? You just need to get all of the con* images into a single 4d file, which should be fairly easy using fslmerge. I believe fslmerge does file globbing (i.e. using the *), so if all of your first-level analyses were in the same top folder, you could run something like: fslmerge -t allcon0001images */con_0001 which would give you a single 4d file called "allcon0001images", containing one con_0001 volume for each subject. (As with most FSL functions, you can type "fslmerge" without any arguments to see the usage/help for the function.) Hope this helps! Best regards, Jonathan -- Dr. Jonathan Peelle Department of Neurology University of Pennsylvania 3 West Gates 3400 Spruce Street Philadelphia, PA 19104 USA http://jonathanpeelle.net/