On Fri, Jan 20, 2012 at 6:31 PM, Gregor Strobbe
<[log in to unmask]>
wrote:
Thank you for your answer,
I assume the CSF isn't modeled, just one brain compartment
with one conductivity value?
I am asking this, because I want to build exactly the
same model based on the Finite Difference Method to
compare with BEM as a first comparison step. The next step
is to compare with more advanced FDM head models.
Kind regards
2012/1/20 Vladimir Litvak
<[log in to unmask]>
Dear
Gregor,
What matters for the BEM computation is the
inner skull boundary which separates the bone
compartment from the CSF compartment. The brain
surface is only used to create the source model
for imaging source reconstruction i.e. figure
out where the dipoles are located and how they
are oriented. If you just want to put a dipole
somewhere inside the head and compute its lead
field you don't need the cortical surface for
that. I hope this helps.
Best,
Vladimir
On Fri, Jan 20,
2012 at 3:03 PM, Gregor Strobbe
<[log in to unmask]>
wrote:
Dear SPM
experts,
I have a question about the bemcp
method to build a BEM model for EEG
source reconstruction in SPM. Am I
right that there are three different
tissues assumed in the model,
including scalp, skull and brain
tissue? Can someone explain me, how
the cortical surface is incorporated
in this model? Is the cortical surface
explicitly incorporated in the
calculation of the BEM lead fields?
Kind regards
Gregor
--
Gregor
Strobbe
Doctoral researcher
IBiTech - Medisip
(Ghent University)
De Pintelaan 185, Blok B
BE-9000 Gent (Belgium)
Tel: +3293324322
--
Gregor
Strobbe
Doctoral researcher
IBiTech - Medisip
(Ghent University)
De Pintelaan 185, Blok B
BE-9000 Gent (Belgium)
Tel: +3293324322
