Dear FSL expert,
I used voxel-wise SIENA to explore the regional brain structural edge movements from longitudinal SIENA flow_AB imaging. However I got different results from TWO difference RANDOMISE setting. I thought the first randomise setting will only reduce the significant level of TFCE result as permutation only occurs in NONE ZERO voxels, but I got completely difference significant TFCE map. Dose anyone know why?
first randomise setting: permutation in whole brain
randomise -i flow4D -o sienar -d design.mat -t design.con -n 5000 -T
second randomise setting: restricted Permutation within the edge mask
randomise -i flow4D -o sienar -d design.mat -t design.con -n 5000 -m ${FSLDIR}/data/standard/MNI152_T1_2mm_edge -T --T2
Thank you very much in advance.
Joyce
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