[vtkusers] what's wrong in this pipeline

[Ali Habib]

I want to display the 3D of DICOM but there's no output, I use activiz , any
idea what's wrong in my code

vtkDICOMImageReader VDR = vtkDICOMImageReader.New();
            VDR.SetDirectoryName(@"E:\Master Degree\DataSet\08151407");
//E:\Master Degree\test DataSet\Asmaa_pre\08151449
            VDR.SetDataOrigin(0, 0, 0);
            VDR.Update();


            vtkImageGaussianSmooth gaussfilter =
vtkImageGaussianSmooth.New();
            gaussfilter.SetInputConnection(VDR.GetOutputPort());
            gaussfilter.Update();

            vtkImageShrink3D VIS = vtkImageShrink3D.New();
            VIS.SetShrinkFactors(4, 4, 4);
            VIS.SetInputConnection(gaussfilter.GetOutputPort());
            VIS.Update();

            vtkMarchingCubes SkinExtractor = new vtkMarchingCubes();
            SkinExtractor.SetInputConnection(VIS.GetOutputPort());
            SkinExtractor.SetValue(0, -800);
            SkinExtractor.Update();

            vtkPolyDataMapper mapper = vtkPolyDataMapper.New();
            mapper.SetInputConnection(SkinExtractor.GetOutputPort());

            vtkLODActor actor = vtkLODActor.New();
            actor.SetMapper(mapper);
            actor.GetProperty().SetColor(1, 0, 0);

            vtkRenderer ren1 =
renderA.RenderWindow.GetRenderers().GetFirstRenderer();
            vtkRenderWindow renWin = renderA.RenderWindow;

            ren1.AddViewProp(actor);

           // renWin.SetSize(250, 250);
            renWin.Render();

            renderA.Refresh();
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