Yea, just run mris_preproc on both subjects. There are even some options there for computing paired differences (simple differences or differences relative to the mean, etc)

On 8/7/18 6:10 PM, Rockers, Elijah D. wrote:

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Hello,

I have a subject with two MRIs and surface reconstructions, several years apart. I would like to directly compare these surfaces if possible, for instance, to subtract (new - old) to see a "difference surface" or something similar. Is there a way to A) Get the surfaces into the same space so they can be combined mathematically, and B) performs operations with the surfaces, a la fslmaths?

Many thanks,

• Eli

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