[vtkusers] how to extract different connective fields out of a isosurface?

[戴 硕]

hi, everyone 
   I've got an isosurface of bones from 2D CT data by using 
vtkMarchingCubes. 
There are several bones in it. Now I want to operate on each bone 
separately. 
How can I extract them from the same isosurface? In other words, how can I 
extract the different connective fields? Are there any vtk classes can help 

me? 
   Any suggestions are greatly appreciated. 
                                                      Daishuo 


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