Hi Doug,<div><br></div><div>Is it possible to use the bbregister parameters to resample a functional image such that it is in register with the anatomical image but retains the epi geometry? I actually don&#39;t care so much about the epi-anat registration, but what I would like to be able to do is motion correct and otherwise preprocess my timeserieses within session* and then move different sessions into a common volumetric space for analysis. As I have great faith in bbregister, ideally the transformation would be determined with this method (I suspect it is superior to picking a slice from one of the sessions to use as a motion correction target across all sessions). Additionally, I would prefer not to upsample the source voxels either into 1x1x1 anatomical geometry or to surface vertices. Unfortunately, my affine understanding isn&#39;t deep enough for me to figure this out myself.</div>

<div><br></div><div>Does that make sense, and (if so) do you have any ideas?</div><div><br></div><div>Thanks!</div><div>Michael</div><div><br></div><div>* Here i use &quot;session&quot; in the sense of &quot;run&quot;, which is different I think from FSFast terminology so apologies for any confusion.</div>