You may also want to consider using a group-based average fieldmap as
was relatively recently discussed on the list. See
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=fsl;d66aa3ac.1409
On Sat, Nov 22, 2014 at 12:31 AM, Dimitrios Palidis
<[log in to unmask]> wrote:
> Hello FSL experts,
>
> I would like to run a temporal concatenation Group ICA with BBR registration. I also want to use B0 unwarping, but my problem is that I have not acquired field maps for the first few subjects in my data set. Ideally I would use B0 unwarping to register the subjects for whom I have acquired field maps and not perform the correction for those subjects without field maps. However, the Melodic GUI will not allow me to select B0 unwarping unless I specify a field map for each scan. Is there any way around this?
>
> Furthermore, as I scan more subjects I wish to repeat my group ICA with the larger data set. Normally, the preprocessing is repeated for each subject, even those that I have already analyzed. Is there any way I can simply reuse the previously preprocessed data to save time in my analysis?
>
> Thanks for reading,
> Dimitri
--
Niels Bergsland
Integration Director
Buffalo Neuroimaging Analysis Center
100 High St. Buffalo NY 14203
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