[Simnibs-discuss] Percentage of spreading scalp stimulation

[Oula Puonti]

Hi Atsushi,

You can extract the magnitude of the e-field in the scalp if that's
what you're interested in. See examples on how to analyze the
simulation results here:

https://simnibs.github.io/simnibs/build/html/tutorial/analysis.html

Instead of cropping the mesh with compartment number 2 you can use
compartment number 5 to get the magnitude of the electric field in the
skin (or rather scalp). You can then calculate the percentage of the
total scalp volume stimulated with an electric field exceeding a given
threshold. 

Alternatively you can read in the output mesh from the simulation and
use the field_summary() function to get the percentiles, see details
here:

https://github.com/simnibs/simnibs/blob/master/simnibs/mesh_tools/mesh_io.py#L2537

Again use compartment 5 as the roi to get the summary of the scalp.

Best,
Oula


On Wed, 2023-01-18 at 17:59 +0900, Atsushi Shima wrote:
> Dear SimNIBS team,
> 
> I have a question of the spreading stimulation on the scalp.
> 
>  Is it possible to know the relative percentage of the spreading
> scalp stimulation?
>  
> Thanks,
> Atsushi Shima
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