How to compare 2 time point volumes (STL) with color map

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Hello.

I studied compare 2 time volumes (with surface)

I have dicom CBCT files. and I segmented mandible and export as STL format.

I want to use color map on comparing 2 time point change.

May be it’s too basic to ask to specialists.

  • Is there any way to compare 2 STL file change using color map?

I think population viewer need onlt VTK files.

But converting .stl to .vtk is also struggle to me.

Please guide me how to compare stl files with color map in Slicer.

Way to converting stl to vtl / dcm to vtk would be big help to me.

Thank you.