[Simnibs-discuss] Downsample surface

[Axel Thielscher]

Hi,

the way to do this is to first run the simnibs simulation with the full 
resolution headmesh and afterwards interpolate the results onto the 
nodes of the 16k surface. This is done using the method 
"interpolate_to_surface" that is part of simnibs.msh.mesh_io

There is currently no example code which we can share, but you can look 
at line 1480 in

https://github.com/simnibs/simnibs/blob/master/simnibs/msh/transformations.py

where we use that method to interpolate the e-field results to the 
central GM surfaces created by CAT12.


Best regards,

Axel


On 18-10-2022 07:45, Huertas Penen, Silvana (UT-EEMCS) wrote:
> Hi,
>
> I need to have a headmesh in Simnibs with 16k vertices in the surface. 
> This to be able to use the output of simnibs in TVB. What I did was to 
> import the headmesh I did in Simnibs to Brainstorm and then downsample 
> to 16k. Now I have the surface downsampled but I do not know how to 
> input/merge this with the headmesh I made in SimNibs. Do you know how 
> to do this?
>
> Or if there is a method in simnibs to downsample the surface in the 
> headmesh?
>
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-- 
Dr. Axel Thielscher
Professor of Neurophysics and Neuroimaging
Danish Research Center for Magnetic Resonance
Copenhagen University Hospital Hvidovre
DK-2650 Hvidovre, Denmark
www.drcmr.dk
&
Department of Health Technology
Technical University of Denmark
DK-2800 Kgs. Lyngby
http://www.healthtech.dtu.dk/
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