[Simnibs-discuss] ROI drawing

Oula oulap at drcmr.dk
Tue Oct 11 15:19:35 CEST 2022

Hi Bella,

It's a bit tricky to draw on the surfaces directly.

What you could do is to run the simulations with map_to_surf set to 
true, so that the e-field is interpolated onto the middle gray matter 
surface. After that, draw the ROI on the MRI volume, i.e., manually 
create a ROI mask using for example freeview. Once you have that, you 
can use freesurfer's mri_vol2surf to map the volume ROI onto the middle 
gray matter surface, and visualize/analyze the e-field within the ROI.


On 9/2/22 14:32, ZHANG, bellabingbing [Student] wrote:
> Dear Dr. Thielscher,
> I am a Ph.D student from the Hong Kong Polytechnic University. We 
> recently submitted an article to a juornal. However, the reviewer 
> suggests we draw the ROI on the figure. Therefore, I would like to 
> visualize the ROI on the brain surface after the E_field simulation as 
> follows. Do you have any suggestions how could I do this?
> Best Regards,
> Bella ZHANG
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