Hi
the current version of melodic does not perform group ICA - for now
you could try concatenating all data into one 4d file and run
standard melodic on this file. You'll need to co-register the data
into a common space first. After estimating the spatial maps and time
courses you can split up the latter into subject-specific chunks and
feed these timecourses into some meta-analysis.
cheers
christian
On 27 Oct 2006, at 11:45, Agnew, Zarinah wrote:
>
> Hi there,
>
> I am trying to do some ICA exploration on group data and am unsure
> of how to go about it as I have only ever done it on individual data.
>
> Do I need to merge all my preprocessed files into a 4D file? Or do
> I create 4D files for each individual data set and enter a number
> of 4D files into the MELODIC GUI..?
>
> Many thanks
>
> Zarinah Agnew.
>
>
>
> Zarinah Agnew
> Stem Cell Imaging
> MRC Clinical Sciences Centre
> Imperial College London
> Hammersmith Hospital Campus
> Du Cane Road
> London
> W12 0NN
>
> Tel. 0208 38 (33796)
> [log in to unmask]
>
> www.csc.mrc.ac.uk
>
--
Christian F. Beckmann
Oxford University Centre for Functional
Magnetic Resonance Imaging of the Brain,
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
Email: [log in to unmask] - http://www.fmrib.ox.ac.uk/~beckmann/
Phone: +44(0)1865 222551 Fax: +44(0)1865 222717
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