[vtkusers] convert vtkimagetype to vtkpolydata or vtkunstructured

[Ali Habib]

Dear all,
I want to convert the output of vtkDICOMImageReader to vtkpolydata or
vtkunstructured grid , to be used with vtkdealunary3D

using vtkthreshold give an exption wish can''t load 33..element


any suggestion

best regards
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