Dear Alfonso and all,
I couldn't find much information about the voxel-to-voxel analysis.
I have 30 healthy subjects with resting state functional images. 
My main question is how to use voxel-to-voxel analysis to parcellate thalamus into functional subregions?
My specific questions are:
1) At the Setup, should I change the explicit mask with only thalamus mask? To do so, are the connectivity patterns only within the thalamus not with rest of the brain? However, if I don't use the thalamus mask, how to get only the subregions of thalamus connectivity patterns (or subclusters of thalamus)?
2) Since I have only one group, can I use either one of the analysis methods (ILC, RCC, ICC or RSC)? 
3) At first level results, why did ICC and ILC only generate 1 component (1 contrast) and for RCC and RSC, they generate 4 component (3 contrasts)? what do they mean?
4) how does the kernel size affect the results
5) Which files in the firtlevel results should I look at (BETA map?) for the subregions of thalamus based on voxel-to-voxel analysis at individual level and group level? 
Thank you for your help.
Sincerely
Hong