sLoreta or any Inverse solution algorithm

[Brasig]

Hi,
I' m new to BCI. I'm in the dark for weeks If any one can shine some light on this please HELP .
I'm looking for a doc with sloreta or any Inverse solution algorithm (calculus details, matrix coefficients calculus, ...etc).

I read many good papers about sloreta.
The papers shows me high level steps (...a matrix has a quadratic form...etc)
I guess, Details are too trivial for experts. Not for me, I can't find the missing steps.

I need to calculate matrix coefficient by hands before using a library doing it for me ? How to feed my matrix and obtain voxel's current...?


Thank you for your time

[yrenard]

Dear Brasig,

thank you for your interest in OpenViBE and welcome on this forum. Indeed, you must have a model telling how the currents go through the brain to the surface. Someone with more valuable knowledge in inverse models will give you a more detailed answer soon. Please stay tuned.

Yann

[mcongedo]

Hello Brasig,

details on sLORETA transfer matrix computation can be found in article

Congedo Marco. Subspace Projection Filters for Real-Time Brain Electromagnetic Imaging
IEEE Transactions on Biomedical Engineering, 53(8), 1624-34, 2006

You can download the paper at
http://sites.google.com/site/marcocongedo

The only difficulty is to have a leadfield matrix to start with.

Cheers,

Marco CONGEDO,

Research Scientist,
Centre Nationale de la Recherche Scientifique (cnrs) and Grenoble University.

[Brasig]

Hello Brasig,

details on sLORETA transfer matrix computation can be found in article

Congedo Marco. Subspace Projection Filters for Real-Time Brain Electromagnetic Imaging
IEEE Transactions on Biomedical Engineering, 53(8), 1624-34, 2006

You can download the paper at
http://sites.google.com/site/marcocongedo

The only difficulty is to have a leadfield matrix to start with.

Cheers,

Marco CONGEDO,

Research Scientist,
Centre Nationale de la Recherche Scientifique (cnrs) and Grenoble University.

[yrenard]

Dear Brasig,

what was this ?

Did Marco's answer solve your problem ?

Regards,
Yann