Hello everyone, When I use 3D SLICER, I only have a surface mesh in here. But, I want to do this file in a Finite Element Sofware, I need a volumetric mesh. Can you tell me how to convert a surface mesh to a volumetric mesh in 3DSLICER? Thank you so much, Van Sy,

Segment mesher extension generates a volumetric mesh (unstructured grid containing tetrahedron and maybe also wedge cells). Why do you think the mesh is not a volumetric mesh?

[image] Van_Sy: I want to do this file in a Finite Element Sofware Hi Van Sy, I think I have met with the similar problem. I want to segment a structure (breast tumor) from MR image and then import the model to Ansys Software for finite element analysis. But I found the result of segmentatio…

ICEM can import surface meshes (STL files) - see for example this old forum topic. Segment Mesher can generate tetrahedral meshes that you can save in VTK unstructured grid (.vtu) file format. You may need a mesh conversion utility to convert it to a file format that can be read by your FEM software…

This is a useful tool with a source code.

The issue is not that we wouldn’t have volumetric mesh generators in Slicer. We can generate volumetric meshes in Slicer using Cleaver2 or Tetgen via Segment Mesher extension. The issue is that the output file format (vtk unstructured grid) cannot be directly read by the commercial solvers or pre-pr…

Thank you all for the discussion. ICEM can indeed import mesh from unstructured grid, but in fact failed to import from vtu or vtk format. Meshio can successfully convert .vtu file to .msh file which can read by the ICEM. Another way I tried was to convert the surface mesh created by Slicer segmenta…

Yes the most typical exported formats from segmentation are closed surface (model node) and binary labelmap. You can also export to planar contours and fractional labelmap with the current version. Maybe we could add segmentation converter rules that use Cleaver2 / Tetgen and can generate volumetri…

Dear Andras, I am trying to convert .vtk file into inp file using meshio. the vtk file is not read by meshio. it gives error assert section == “FIELD”, “Unknown section ‘{}’.”.format(section) AssertionError: Unknown section ’ how to resolve this error. please help.

Meshio does not support binary .vtk files. You can save ascii .vtk file by checking “Show options” and unchecking “Compress” in Save data dialog. This worked for me in the Python interactor of a recent Preview Release: pip_install('meshio') import meshio mesh = meshio.read(r"c:\tmp\Model.vtk") mes…

Yes after unchecking compress in options it worked. thanks Andras

Convert a surface mesh to a volumetric mesh in 3D Slicer

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Convert a surface mesh to a volumetric mesh in 3D Slicer

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