In a longitudinal fMRI study with multiple T1w images per subject (one per session), I want to avoid averaging anatomical changes across time. By default, does fMRIPrep register all sessions to a single T1w template per subject (even without --longitudinal) — it seems so, correct?
Is there a way to ensure each session is aligned to its own session-specific T1w instead?
I’ve seen older posts on this, but wondering if there’s now a more sophisticated or supported way to achieve this.