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Hi Steve,

When you "unlikely to be successful", will MELODIC crash or produce spurious results? I've seen one paper use a spatially-restriced ICA using PCC/precunueus as an ROI. If someone is attempting a similar analysis, is there a lower limit for the number of voxels (e.g., voxels > time points?)? Or, are the any red flags to indicate that the analysis produced invalid results due to insufficient number of voxels?

Thanks,
David



On Jul 23, 2013, at 10:47 AM, Stephen Smith <[log in to unmask]> wrote:

Hi - in general, no, spatial ICA needs a large number of voxels to work - so this is unlikely to be successful.
Cheers.



On 23 Jul 2013, at 15:46, Jake <[log in to unmask]> wrote:

Hello FSL users,

I would like to know if it is possible to run ICA on a ROI using FSL. I mean running ICA only in the ROI area?

Best Regards,
Jake



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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director,  Oxford University FMRIB Centre

FMRIB, JR Hospital, Headington, Oxford  OX3 9DU, UK
+44 (0) 1865 222726  (fax 222717)
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David V. Smith, Ph.D.
Postdoctoral Fellow, Delgado Lab
Department of Psychology
Rutgers University
Newark, NJ 07102
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