How do they look in the volume? Can you send pics?

Elvira Fischer wrote:
>
> Dear freesurfer users,
>
> Maybe somebody could help me with the following problem: 
>
> On my retinotopic map I observe extensive blobs with max. values 
> (turquoise and yellow, heat color map), that rather look like noise. 
> However these blobs always appear in the same region, around the 
> anterior portion of the calcarine sulcus in every subject, independent 
> of which paradigm we used for the retinotopy. I use the standard 
> protocol as described for freesurfer/FsFast Individual Retinotopy 
> Analysis on FreeSurferWiki, to analyze my data, however use 
> sfa2fieldsign to display the color map on the inflated surface.
>
> If someone has an explanation or a clue why I observe these blobs 
> and/or has suggestions how to prevent them , I'm very thankful.
>
> Thanks a lot
>
> Best, Elvira
>
>
>
>
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-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358 
Fax: 617-726-7422

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