I am currently going through brainstorm documentation as a tool to localize the epileptogenic zone on sEEG/EcoG. Pr Karas was wondering if one can vary the white matter conductivity in the fibers close to the epileptogenic zone in brainstorm. Indeed, repeated seizures render some tracts more conductive. If it is not yet available in brainstorm and/or DUNeuro, I would like to develop it for our studies. I have experience in developing finite element codes in matlab and C++.
Thank you
Regards,
Anne-Cecile Lesage, PhD
Research scientist
University of Texas Medical Branch, Galveston, Texas
The current implementation does not allow the change of the conductivity from the brainstorm interface/scripts.
However, this can be possible by changing portions of the code and the input files to DUNEuro.
You can do that by using the conductivity tensors defined at each FEM element.
If you can localize the area where you want to change the conductivity,
you can then find the associated FEM element and then change the local conductivity, and then call again the FEM solver.
If you want to try this, I'll have a look on the code and guide you to where you need to change it.
I am working on a similar task, trying to feed the brain model solver with exact conductivities in specific area. I am wondering, have you been successful with your implementation? Would you be so kind as to share your solution?
It allows the refinement of the specific ROI of the brain and head. If you review the code, you can modify it to define this region as new tissue and then assign a different conductivity for modeling purposes.
here is the error message, apparently channel 198 is the problem. Though I am confused about which contact it is. Is it 198 (T9) from the implantation (see table on the left)? I will remove T9 and T10 and retry
