Hi!
I just wonder if it matters what volume you align to when it comes to motion regressors. Assume we don't do any warping, just the align block and for some reason (in this time real time fMRI) want to align the EPI volumes to an EPI volume from a previous run (localizer or seed mask from a pervious run). When preforming the regression of the current run with the motion regressors, will this mattter?
I base this on the assumtion that the motion regressors are generated during the alignment: The ammount you have to re-orient one EPI to the next gives motion and angulation in the 3 directions of space. If you then align to an EPI not from this run, will that cause problems?
I think it won't since i guess that would also cause trouble with the "align to min outlier volume" but I just want to make sure!
Thanks!
