problems making a template grid

[Ingrid Nieuwenhuis]

Hi Andreas,

1, I added a comment on the wiki, thanks for your suggestion
2, 'T1.mnc' is a smoothed template based on multiple subjects, to deal with
between subject variation in anatomy. This is needed for proper
normalization. Template distributed with spm (in templates folder)
'single_subj_T1.mnc' is a single subject template, needed for proper
segmentation. Also added this comment on the wiki.

Have a nice weekend,
Ingrid

------------------------------------
Ingrid L.C. Nieuwenhuis
PhD student
Donders Institute for Brain, Cognition and Behaviour,
Centre for Cognitive Neuroimaging
Radboud University Nijmegen, The Netherlands
Email: ingrid.nieuwenhuis at donders.ru.nl
Tel: 0031 (0)24 - 36 10887

-----Original Message-----
From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On Behalf
Of Andreas Wollbrink
Sent: Wednesday, April 14, 2010 10:21 AM
To: FIELDTRIP at NIC.SURFNET.NL
Subject: [FIELDTRIP] problems making a template grid

Hi all,

I encountered some problems generating a template source grid as
described in the fieldtrip example matlab script 'Create MNI-aligned
grids in individual head-space':

1. in chapter 'Make the template_grid': Without defining a template
image in the cfg structure prior to use ft_volumesegment the default
setting cfg.template = '/home/common/matlab/spm2/templates/T1.mnc' is
used. Since this file might not exist in this specific folder on a
personal computer the function fails.
After defining cfg.template I succeed in using the function.
It might be helpful for others to add this comment to the example script.

2. My question at this point is: Should one use the individual template
'single_subj_T1.mnc' or the average template 'T1.mnc' to segment the
template brain and construct a volume conduction model?

3. Furtheron the function 'prepare_dipole_grid' could not be found. This
functions is placed in the private folder under fieldtrip. How can I
automatically add this folder to my matlab path?

Thanks,
Andreas

--


======================================================================

   Andreas Wollbrink, Biomedical Engineer

   Institute for Biomagnetism and Biosignalanalysis       	
   Muenster University Hospital

   Malmedyweg 15        phone:   +49-(0)251-83-52546
   D-48149 Muenster     fax:     +49-(0)251-83-56874	
   Germany
                        e-Mail: a.wollbrink at uni-muenster.de

======================================================================

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The aim of this list is to facilitate the discussion between users of the
FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG
and EEG analysis. See also
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http://www.ru.nl/neuroimaging/fieldtrip.

----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/neuroimaging/fieldtrip.