From a NifTi Brain Model to COMSOL Bioimpedance simulation

Hi,

I have got a model of the brain from MRI images,
the segmentation is done, what I need is to create a mesh that can be imported in COMSOL Multiphysics,

I already have the materials and their electrical properties ready to use in COMSOL, the problem is that I am unable of creating a mesh that can be used,

Could anybody help me to create a mesh from the nifti model,
I would also like to collaborate with somebody that is good in modelling,


Thanks a lot and best regards
/Ruben