BIDS naming for functional phase acquisitions

I’ve come across some functional epi files that have corresponding phase acquisitions to assess respiratory effects. I haven’t seen anything in the BIDS-spec pertaining to this acquisition type, so I was wondering if it would be appropriate to name the files as such (assuming they’re considered functional and not physiological data):


The _phase suffix is supported under task fMRI (see here).

These data do fall under func/, although we chose not to use an entity (e.g., part-[phase|magnitude]) to keep from breaking most workflows (since they’d generally grab both phase and magnitude data automatically).

I believe that _phase data should pass the BIDS validator from version 1.3.4 on.

Got it, thanks @tsalo