Index: Modules/MitkExt/Algorithms/mitkExtractImageFilter.cpp
===================================================================
--- Modules/MitkExt/Algorithms/mitkExtractImageFilter.cpp	(revision 21081)
+++ Modules/MitkExt/Algorithms/mitkExtractImageFilter.cpp	(working copy)
@@ -55,7 +55,9 @@
    else if (input->GetDimension() == 2)
    {
      Image::Pointer resultImage = ImageToImageFilter::GetOutput();
-     resultImage = const_cast<Image*>(input.GetPointer());
+	 Image* inputImage = const_cast<Image*>(input.GetPointer());
+	 resultImage->Initialize( inputImage );
+     resultImage->SetPicVolume( mitkIpPicClone(inputImage->GetVolumeData(0)->GetPicDescriptor()) );
      ImageToImageFilter::SetNthOutput( 0, resultImage );
      return;
    }
Index: Modules/MitkExt/Algorithms/mitkOverwriteSliceImageFilter.cpp
===================================================================
--- Modules/MitkExt/Algorithms/mitkOverwriteSliceImageFilter.cpp	(revision 21081)
+++ Modules/MitkExt/Algorithms/mitkOverwriteSliceImageFilter.cpp	(working copy)
@@ -80,7 +80,8 @@
       break;
   }
 
-  if ( slice->GetDimension() < 2 || input->GetDimension() > 4 ||
+  if ( slice->GetDimension() != 2 ||
+       ( input->GetDimension() != 2 && input->GetDimension() != 3 && input->GetDimension() != 4 ) ||
        slice->GetDimension(0) != input->GetDimension(m_Dimension0) ||
        slice->GetDimension(1) != input->GetDimension(m_Dimension1) ||
        m_SliceIndex >= input->GetDimension(m_SliceDimension)
@@ -110,7 +111,14 @@
 
   //MITK_INFO << "Overwriting slice " << m_SliceIndex << " in dimension " << m_SliceDimension << " at time step " << m_TimeStep << std::endl;
   // this will do a long long if/else to find out both pixel types
-  AccessFixedDimensionByItk( input3D, ItkImageSwitch, 3 );
+  if ( input->GetDimension() >= 3 )
+  {
+	  AccessFixedDimensionByItk( input3D, ItkImageSwitch, 3 );
+  }
+  else
+  {
+	  AccessFixedDimensionByItk( input3D, ItkImageSwitch, 2 );
+  }
 
   SegmentationInterpolationController* interpolator = SegmentationInterpolationController::InterpolatorForImage( input );
   if (interpolator)
@@ -185,8 +193,11 @@
   typename VolumeImageType::RegionType            sliceInVolumeRegion;
 
   sliceInVolumeRegion = outputImage->GetLargestPossibleRegion();
-  sliceInVolumeRegion.SetSize( m_SliceDimension, 1 );             // just one slice
-  sliceInVolumeRegion.SetIndex( m_SliceDimension, m_SliceIndex ); // exactly this slice, please
+  if ( outputImage->GetImageDimension( ) == 3 )
+  {
+    sliceInVolumeRegion.SetSize( m_SliceDimension, 1 );             // just one slice
+    sliceInVolumeRegion.SetIndex( m_SliceDimension, m_SliceIndex ); // exactly this slice, please
+  }
   
   OutputSliceIteratorType outputIterator( outputImage, sliceInVolumeRegion );
   outputIterator.SetFirstDirection(m_Dimension0);
Index: Modules/Bundles/org.mitk.gui.qt.segmentation/src/internal/QmitkSegmentationView.cpp
===================================================================
--- Modules/Bundles/org.mitk.gui.qt.segmentation/src/internal/QmitkSegmentationView.cpp	(revision 21081)
+++ Modules/Bundles/org.mitk.gui.qt.segmentation/src/internal/QmitkSegmentationView.cpp	(working copy)
@@ -294,7 +294,7 @@
     mitk::Image::Pointer image = dynamic_cast<mitk::Image*>( node->GetData() );
     if (image.IsNotNull())
     {
-      if (image->GetDimension()>2)
+      if (image->GetDimension()>=2)
       {
         // ask about the name and organ type of the new segmentation
         QmitkNewSegmentationDialog dialog( m_Parent ); // needs a QWidget as parent, "this" is not QWidget
Index: Modules/MitkExt/Controllers/mitkSegmentationInterpolationController.cpp
===================================================================
--- Modules/MitkExt/Controllers/mitkSegmentationInterpolationController.cpp	(revision 21081)
+++ Modules/MitkExt/Controllers/mitkSegmentationInterpolationController.cpp	(working copy)
@@ -88,7 +88,7 @@
   }
 
   if (!segmentation) return;
-  if (segmentation->GetDimension() > 4 || segmentation->GetDimension() < 3) 
+  if (segmentation->GetDimension() > 4 || segmentation->GetDimension() < 2) 
   {
     itkExceptionMacro("SegmentationInterpolationController needs a 3D-segmentation or 3D+t, not 2D.");
   }
@@ -126,7 +126,14 @@
     timeSelector->SetTimeNr( timeStep );
     timeSelector->UpdateLargestPossibleRegion();
     Image::Pointer segmentation3D = timeSelector->GetOutput();
-    AccessFixedDimensionByItk_2( segmentation3D, ScanWholeVolume, 3, m_Segmentation, timeStep );
+	if ( segmentation->GetDimension() >= 3 )
+	{
+      AccessFixedDimensionByItk_2( segmentation3D, ScanWholeVolume, 3, m_Segmentation, timeStep );
+	}
+	else
+	{
+	  AccessFixedDimensionByItk_2( segmentation3D, ScanWholeVolume, 2, m_Segmentation, timeStep );
+	}
   }
 
   //PrintStatus();
@@ -324,6 +331,19 @@
   }
 }
 
+template < typename DATATYPE >
+void mitk::SegmentationInterpolationController::ScanWholeVolume( itk::Image<DATATYPE, 2>*, const Image* volume, unsigned int timeStep )
+{
+	if (!volume) return;
+	if ( timeStep >= m_SegmentationCountInSlice.size() ) return;
+
+	DATATYPE* rawVolume = static_cast<DATATYPE*>( const_cast<Image*>(volume)->GetVolumeData(timeStep)->GetData() ); // we again promise not to change anything, we'll just count
+	//DATATYPE* rawSlice = static_cast<DATATYPE*>( volume->GetSliceData(slice)->GetData() ); // TODO THIS wouldn't work. Did I mess up with some internal mitk::Image data structure?
+	DATATYPE* rawSlice = rawVolume;
+
+	ScanChangedSlice<DATATYPE>( NULL, SetChangedSliceOptions(2, 0, 0, 1, timeStep, rawSlice) );
+}
+
 void mitk::SegmentationInterpolationController::PrintStatus()
 {
   unsigned int timeStep(0); // if needed, put a loop over time steps around everyting, but beware, output will be long
Index: Modules/MitkExt/Controllers/mitkSegmentationInterpolationController.h
===================================================================
--- Modules/MitkExt/Controllers/mitkSegmentationInterpolationController.h	(revision 21081)
+++ Modules/MitkExt/Controllers/mitkSegmentationInterpolationController.h	(working copy)
@@ -176,6 +176,9 @@
     template < typename DATATYPE >
     void ScanWholeVolume( itk::Image<DATATYPE, 3>*, const Image* volume, unsigned int timeStep );
 
+	template < typename DATATYPE >
+	void ScanWholeVolume( itk::Image<DATATYPE, 2>*, const Image* volume, unsigned int timeStep );
+
     void PrintStatus();
 
     /**