Hi Rick,

Thanks for getting back to me so promptly!

I didn't know about the m_tedana option, it would be quite useful. ^__^

Re: the field map:
When is the 'best time' to apply the distortion correction? After temporal (despike and tshift) and before structural (align etc.) steps or could it be done right at the start?
If the latter is ok to do, I could apply the correction and then simply run the pre-processing script as usual?
If the former way is the correct one, however, how could I use the matrix (which I assume is the '+ text file of params :' that is mentioned in the epi_b0_correct.py output section) in a blip block?

By the way, here is my pre-processing script: [www.dropbox.com]

Cheers,
Misho