Curvature values on the head mask

[begumsonmez]

Hello!

I wanted to ask a question regarding how the curvature values were obtained from the head mask .mat file. I am using SimNIBS 4.0 to extract the head mask. But SimNIBS itself does not produce curvature values. Are these extracted using the gmsh functions?

Thank you!
Kind regards,
Begüm Sönmez

[tmedani]

Hey @begumsonmez

These values are computed within Brainstorm for the surface files.

The possible option I see is to extract the surface of the FEM mesh that you have, (right-click and then extract the surface); then, to have the curvature computed, you need to visualize each surface.

Let me know if that works fine with your model.

Best,
Takfarinas

[begumsonmez]

Hey @tmedani

Thank you very much for your reply. I was able to obtain the curvature values from the FEM mesh already. I was wondering how these values were computed, i.e. with what calculation method/algorithm, as I was unable to find a specific documentation about it.

Best,
Begüm

[Raymundo.Cassani]

Hi @begumsonmez,

Not sure if you have seen this post, it may be useful:

Generate head surface

Hello, I am trying to understand Generate head surface function, but some questions come to my mind that I want to ask. First of all, How does Brainstorm define the head surface? Is this only a global thresholding segmentation or do you apply other functions too? Secondly, How does Brainstorm define the curvature after applying the Generate head surface function? which algorithm does it use? Finally, I will be very happy if anybody put the git link of the Generate head surface function here. …

Best,
Raymundo

[begumsonmez]

Hi @Raymundo.Cassani

Yes, this looks very helpful, thank you!

Best,
Begüm