Hello

I would like to do a a seed-to-voxel analysis, but not for all voxels in the whole brain, but only for those voxel which lie within a specified ROI. It seems to me that this is not possible using the GUI or the script or am I mistaken? Originally I thought, I could do this by doing a ROI-to-ROI analysis, but Conn seems to only correlate the timeseries of my seed with the average timeseries of all voxels, or their PCA decomposition or a weighted sum, but I did not figure out how to correlate the seed timeseries with the timeseries of the voxels within the ROI. 

Is it possible to do this by adjusting the source code?

Is there a specific reason why one should not do the approach I was planning to do? What is the advantage of using e.g. the PCA decomposition and what do I lose compared to looking at individual voxels?

Best, 

Isabel