diff --git a/Modules/ImageStatisticsUI/Qmitk/QmitkImageStatisticsCalculationJob.h b/Modules/ImageStatisticsUI/Qmitk/QmitkImageStatisticsCalculationJob.h
index b636d3d80f..cb5ad415ca 100644
--- a/Modules/ImageStatisticsUI/Qmitk/QmitkImageStatisticsCalculationJob.h
+++ b/Modules/ImageStatisticsUI/Qmitk/QmitkImageStatisticsCalculationJob.h
@@ -1,115 +1,117 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 #ifndef QMITKIMAGESTATISTICSCALCULATIONTHREAD_H_INCLUDED
 #define QMITKIMAGESTATISTICSCALCULATIONTHREAD_H_INCLUDED
 
 //QT headers
 #include <QThread>
 #include <QEvent>
 
 //mitk headers
 #include "mitkImage.h"
 #include "mitkPlanarFigure.h"
 #include "mitkImageStatisticsCalculator.h"
 #include <MitkImageStatisticsUIExports.h>
 
 // itk headers
 #ifndef __itkHistogram_h
 #include <itkHistogram.h>
 #endif
 
 
 /** /brief This class is executed as background thread for image statistics calculation.
   * Documentation: This class is derived from QThread and is intended to be used by QmitkImageStatisticsView
                    to run the image statistics calculation in a background thread keepung the gui usable.
   */
 
 class MITKIMAGESTATISTICSUI_EXPORT QmitkImageStatisticsCalculationJob : public QThread
 {
   Q_OBJECT
 
 public:
 
   typedef itk::Statistics::Histogram<double> HistogramType;
 
   /*!
   /brief standard constructor. */
   QmitkImageStatisticsCalculationJob();
   /*!
   /brief standard destructor. */
   ~QmitkImageStatisticsCalculationJob();
 
   /*!
   /brief Initializes the object with necessary data. */
   void Initialize( mitk::Image::ConstPointer image, mitk::Image::ConstPointer binaryImage, mitk::PlanarFigure::ConstPointer planarFig );
   /*!
   /brief returns the calculated image statistics. */
   mitk::StatisticsContainer::ConstPointer GetStatisticsData() const;
 
   mitk::Image::ConstPointer GetStatisticsImage() const;
   mitk::Image::ConstPointer GetMaskImage() const;
   mitk::PlanarFigure::ConstPointer GetPlanarFigure() const;
 
+  //T25568: can be removed when deprecated image statistics plugin is removed
   /*!
   /brief Set the time step of the image you want to process. */
   void SetTimeStep( int times );
   /*!
   /brief Get the time step of the image you want to process. */
   int GetTimeStep() const;
   /*!
   /brief Set flag to ignore zero valued voxels */
   void SetIgnoreZeroValueVoxel( bool _arg );
   /*!
   /brief Get status of zero value voxel ignoring. */
   bool GetIgnoreZeroValueVoxel() const;
   /*!
   /brief Set bin size for histogram resolution.*/
   void SetHistogramNBins( unsigned int nbins);
   /*!
   /brief Get bin size for histogram resolution.*/
   unsigned int GetHistogramNBins() const;
   /*!
   /brief Returns the histogram of the currently selected time step. */
   HistogramType::ConstPointer GetTimeStepHistogram(unsigned int t = 0) const;
   /*!
   /brief Returns a flag indicating if the statistics have changed during calculation */
   bool GetStatisticsChangedFlag() const;
   /*!
   /brief Returns a flag the indicates if the statistics are updated successfully */
   bool GetStatisticsUpdateSuccessFlag() const;
   /*!
   /brief Method called once the thread is executed. */
   void run() override;
 
   std::string GetLastErrorMessage() const;
 
 private:
   //member declaration
 
   mitk::Image::ConstPointer m_StatisticsImage;                         ///< member variable holds the input image for which the statistics need to be calculated.
   mitk::Image::ConstPointer m_BinaryMask;                              ///< member variable holds the binary mask image for segmentation image statistics calculation.
   mitk::PlanarFigure::ConstPointer m_PlanarFigureMask;                 ///< member variable holds the planar figure for segmentation image statistics calculation.
   //std::vector<mitk::StatisticsContainer::ConstPointer> m_StatisticsVector; ///< member variable holds the result structs.
   mitk::StatisticsContainer::Pointer m_StatisticsContainer;
+  //T25568: can be removed when deprecated image statistics plugin is removed
   int m_TimeStep;                                                 ///< member variable holds the time step for statistics calculation
   bool m_IgnoreZeros;                                             ///< member variable holds flag to indicate if zero valued voxel should be suppressed
   unsigned int m_HistogramNBins;                                      ///< member variable holds the bin size for histogram resolution.
   bool m_StatisticChanged;                                        ///< flag set if statistics have changed
   bool m_CalculationSuccessful;                                   ///< flag set if statistics calculation was successful
   std::vector<HistogramType::ConstPointer> m_HistogramVector;          ///< member holds the histograms of all time steps.
   std::string m_message;
 };
 #endif // QMITKIMAGESTATISTICSCALCULATIONTHREAD_H_INCLUDED