diff --git a/Core/Code/Algorithms/mitkVtkImageIdxReslice.h b/Core/Code/Algorithms/mitkVtkImageIdxReslice.h
index caf6aeee59..6ab7b295e9 100644
--- a/Core/Code/Algorithms/mitkVtkImageIdxReslice.h
+++ b/Core/Code/Algorithms/mitkVtkImageIdxReslice.h
@@ -1,58 +1,87 @@
 /*=========================================================================
  
 Program:   Medical Imaging & Interaction Toolkit
 Language:  C++
 Date:      $Date$
 Version:   $Revision: $
  
 Copyright (c) German Cancer Research Center, Division of Medical and
 Biological Informatics. All rights reserved.
 See MITKCopyright.txt or http://www.mitk.org/copyright.html for details.
  
 This software is distributed WITHOUT ANY WARRANTY; without even
 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the above copyright notices for more information.
  
 =========================================================================*/
 
 #ifndef mitkVtkImageIdxReslice_h_Included
 #define mitkVtkImageIdxReslice_h_Included
 
 #include <vtkImageReslice.h>
 #include "MitkExports.h"
 
 	/** \brief A vtk Filter based on vtkImageReslice with the aditional feature to write a slice into the given input volume.
+		All optimizations for e.g. the plane directions or interpolation are stripped away, the algorithm only interpolates nearest
+		neighbour and uses the non optimized execute function of vtkImageReslice.
 	  There are two use cases for the Filter which are specified by the overwritemode property:
 		
 		1)Extract slices from a 3D volume.
 			Overwritemode = false
 
+			In this mode the class can be used like vtkImageReslice. The usual way to do this is:
+			- Set an image volume as input
+			- Set the ResliceAxes via SetResliceAxesDirectionCosines and SetResliceAxesOrigin
+			- Set the the OutputSpacing, OutputOrigin and OutputExtent
+			- Call Update
+
+
 		2)Overwrite a 3D volume at a given slice.
 			Overwritemode = true
+			
+			The handling in this mode is quite similar to the description above with the addition that the
+			InputSlice needs to be specified via SetInputSlice(vtkImageData*).
+			- Set the properties mentioned above (Note that SetInput specifies the volume to write to)
+			- Set the slice to that has to be overwritten in the volume ( SetInputSlice(vtkImageData*)
+
+			After calling Update() there is no need to retrieve the output as the input volume is modified.
+
+			\sa vtkImageReslice
+			(Note that the execute and interpolation function are no members and thus can not be overriden)
 	 */
 	class MITK_CORE_EXPORT mitkVtkImageIdxReslice : public vtkImageReslice
 	{
 	public:
 		static mitkVtkImageIdxReslice *New();
 		vtkTypeMacro(mitkVtkImageIdxReslice, vtkImageReslice);
 
+		/** \brief Set the mode either to reslice (false) or to overwrite (true).
+		    Default: false
+		 */
 		void SetOverwriteMode(bool b);
 
+		/** \brief Set the slice for overwrite mode.
+		  Note:
+			It is recommend not to use this in reslice mode because otherwise the slice will be modified!
+			*/
 		void SetInputSlice(vtkImageData* slice);
 
 
 	protected:
 		
 		mitkVtkImageIdxReslice();
 		virtual ~mitkVtkImageIdxReslice();
 
+		bool m_Overwrite_Mode;
+
+		/** Overridden from vtkImageReslice. \sa vtkImageReslice::ThreadedRequestData */
 		virtual void ThreadedRequestData(vtkInformation *vtkNotUsed(request),
  																		 vtkInformationVector **vtkNotUsed(inputVector),
  																		 vtkInformationVector *vtkNotUsed(outputVector),
  																		 vtkImageData ***inData,
  																		 vtkImageData **outData,
  																		 int outExt[6], int id);
 	};
 
 
 #endif //mitkVtkImageIdxReslice_h_Included