Merge tetra mesh with multiple elemID within enclosed surface about iso2mesh HOT 2 CLOSED

@tmedani, do you have to insert all interior nodes in the electrode tet mesh to the output mesh?

if not, you can use mergemesh (as long as the electrode does not intersect with the brain surface) or mergesurf to combine the electrode surface mesh (multi-compartment) with brain surface mesh. Then you can call surf2mesh with seed points to create a combined tetrahedral mesh.

alternatively, instead of using your tetrahedral electrode mesh, iso2mesh has a function called meshcylinders - a function I wrote specifically for Lead-DBS where iso2mesh was used to create electrode/brain meshes.

if you have to insert the electrode interior nodes from your existing mesh to the output, you could use meshrefine - you can refine a tet mesh created by brain surface only by inserting new nodes and surface triangles taken from the electrode mesh. the nodes/elements inside the electrode will be more than your original electrode mesh, but all nodes/triangles of the electrode should preserve in the output.

Lead-DBS supports many electrode shapes, you can find example meshing codes by searching s2m and surfboolean in the project, for example

https://github.com/netstim/leaddbs/blob/d2e0029317a9c0d88f5f821320470519ab486a31/templates/electrode_models/ea_genvol_sde_08.m
https://github.com/netstim/leaddbs/blob/d2e0029317a9c0d88f5f821320470519ab486a31/vatmodel/ea_mesh_electrode.m

from iso2mesh.

Hi @fangq

That's helpful, meshcylinders is great, thanks

I went through the leadDBS code and data and found interesting models and scripts.

Thanks for your precious help.

Best

from iso2mesh.