[Freesurfer] Running FSL randomise on FS cortical thickness data

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Dear Freesurfer experts,

Hi. We are analyzing cortical thickness data in Freesurfer, longitudinal data in 55 subjects using the linear mixed effects package. We are finding a number of siginificant clusters, and would like to correct for multiple comparisons with permutation testing. We have already run about 2000 permutations, and would like to use TFCE available in randomise rather than empirical methods to set parameters such as the cluster forming threshold.

So, the simple question is, how do we convert our FS format data (these are F statistics at each vertex) into a format which can be read into randomise?

Thanks for any advice you can provide.

Best,

Mark _______________________ Mark Wagshul, PhD Albert Einstein College of Medicine Bronx, NY

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