Source localization with minimum norm

[Gatien Hocepied]

Hello all,

 

I ‘m facing serious problems with this function
 How can I define the
dip.inside and dip.outside ?  Besides, for 2 dipoles, this line seems to be
incorrect : 

 

dip.leadfield{i} = compute_leadfield(dip.pos(i,:), grad, vol, 'reducerank',
reducerank, 'normalize', normalize, 'normalizeparam', normalizeparam) *
dip.mom(:,i);

 

It seems to be a dimension problem between the matrix given by
compute_leadfield and dip.mom (1x6 in case of 2 dipoles
)


 

Thx in advance,

Gatien Hocepied

 

 

 

De : FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] De la part
de Victoria Eugenia Montes Restrepo
Envoyé : jeudi 5 mars 2009 22:21
À : FIELDTRIP at NIC.SURFNET.NL
Objet : [FIELDTRIP] Source localization with minimum norm

 

Hello all,

 

 

I'm using the minimumnormestimate() function from the Forwinv toolbox with a
four-shell spherical head model, and assuming orthogonal dipoles
orientation. When applying this function, I obtain the strengths and power
at each source location. If my objective is choosing a single source, which
procedure should I use after estimation of these current densities?

 

Thanks in advance,

 

 

Victoria Eugenia Montes

Universidad Nacional de Colombia - Manizales

----------------------------------

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.

http://listserv.surfnet.nl/archives/fieldtrip.html

http://www.ru.nl/fcdonders/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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20090309/e7df6b04/attachment-0002.html>