Dear Emily,
Yes, without a fieldmap, Realign&Unwarp will still try to correct for
the movement by distortion interaction. See slide 8 of this presentation:
http://www.fil.ion.ucl.ac.uk/spm/course/slides16-oct/01_Preprocessing.pptx
and the links provided in this post:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=spm;f6342324.1701
for more details.
Best regards,
Guillaume.
On 16/03/17 14:19, Emily Belleau wrote:
> Hello,
>
> This is a basic question, my apologies.
>
> I was wondering if there is an advantage to using unwarp when you don't
> have a field map? Based on my undestanding, there would be an
> advantage, as unwarping could help handle additional movement
> susceptibilities not handled by realignment?
>
> Thank you!!
>
> Emily
--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG
|