Hello again,

Thanks for your quick replies. One more question.

The aal template provided by conn (conn\utils\otherrois\aal.nii) has 181x217x181 voxels and a 1x1x1mm spatial resolution.

Conn does not generate any error messages when this ROI template is used with the MNI152 structural image (91x109x91 voxels, 2x2x2mm). Does this mean that conn is registering one image to the other in the background?

Or should I register the aal template to MNI space myself and then just use the coregistered aal template for analysis?

I've run several analyses without realizing that this was happening and now I'm not sure if the results are legitimate.

Thanks!