Hi everyone
how is TR length impacting ReHo results?
I have performed resting state fmri with TR 2.0 sec and studied reho changes in the cerebellum.
I am now analyzing imaging acquired before this new sequence(same subjects population type): here the voxel size is the same, but we have half of the total number of runs (99 versus 192 of the previous sequence)and the TR is 5.0 . When I process through 3dReHo these dataset I am not able to find any reasonable (kendal coefficient >0.5) reho activation in the cerebellum even with a neighbor size of 93voxels.
What is your opinion?
thanks a lot