diff --git a/Modules/ImageStatistics/mitkImageStatisticsConstants.cpp b/Modules/ImageStatistics/mitkImageStatisticsConstants.cpp
index 08cdbcb847..a1909086b8 100644
--- a/Modules/ImageStatistics/mitkImageStatisticsConstants.cpp
+++ b/Modules/ImageStatistics/mitkImageStatisticsConstants.cpp
@@ -1,37 +1,69 @@
 /*===================================================================
 
 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.
 
 ===================================================================*/
 
 #include "mitkImageStatisticsConstants.h"
 
-const std::string MEAN{ "Mean" };
-const std::string MEDIAN{ "Median" };
-const std::string STANDARDDEVIATION{ "StandardDeviation" };
-const std::string VARIANCE{ "Variance" };
-const std::string RMS{ "RMS" };
-const std::string MAXIMUM{ "Max" };
-const std::string MAXIMUMPOSITION{ "MaxPosition" };
-const std::string MINIMUM{ "Min" };
-const std::string MINIMUMPOSITION{ "MinPosition" };
-const std::string NUMBEROFVOXELS{ "#Voxel" };
-const std::string VOLUME{ "Volume [mm^3]" };
-const std::string SKEWNESS{ "Skewness" };
-const std::string KURTOSIS{ "Kurtosis" };
-const std::string UNIFORMITY{ "Uniformity" };
-const std::string ENTROPY{ "Entropy" };
-const std::string MPP{ "MPP" };
-const std::string UPP{ "UPP" };
-const std::string LABEL{ "Label" };
-const std::string HISTOGRAM{ "Histogram" };
+const std::string mitk::ImageStatisticsConstants::MEAN() {
+  return "Mean";
+}
+const std::string mitk::ImageStatisticsConstants::MEDIAN() {
+  return "Median";
+}
+const std::string mitk::ImageStatisticsConstants::STANDARDDEVIATION() {
+  return "StandardDeviation";
+}
+const std::string mitk::ImageStatisticsConstants::VARIANCE() {
+  return "Variance";
+}
+const std::string mitk::ImageStatisticsConstants::RMS() {
+  return "RMS";
+}
+const std::string mitk::ImageStatisticsConstants::MAXIMUM() {
+  return "Max";
+}
+const std::string mitk::ImageStatisticsConstants::MAXIMUMPOSITION() {
+  return "MaxPosition";
+}
+const std::string mitk::ImageStatisticsConstants::MINIMUM() {
+  return "Min";
+}
+const std::string mitk::ImageStatisticsConstants::MINIMUMPOSITION() {
+  return "MinPosition";
+}
+const std::string mitk::ImageStatisticsConstants::NUMBEROFVOXELS() {
+  return "#Voxel";
+}
+const std::string mitk::ImageStatisticsConstants::VOLUME() {
+  return "Volume [mm^3]";
+}
+const std::string mitk::ImageStatisticsConstants::SKEWNESS() {
+  return "Skewness";
+}
+const std::string mitk::ImageStatisticsConstants::KURTOSIS() {
+  return "Kurtosis";
+}
+const std::string mitk::ImageStatisticsConstants::UNIFORMITY() {
+  return "Uniformity";
+}
+const std::string mitk::ImageStatisticsConstants::ENTROPY() {
+  return "Entropy";
+}
+const std::string mitk::ImageStatisticsConstants::MPP() {
+  return "MPP";
+}
+const std::string mitk::ImageStatisticsConstants::UPP() {
+  return "UPP";
+}
diff --git a/Modules/ImageStatistics/mitkImageStatisticsConstants.h b/Modules/ImageStatistics/mitkImageStatisticsConstants.h
index 689f3639c1..29fee6265c 100644
--- a/Modules/ImageStatistics/mitkImageStatisticsConstants.h
+++ b/Modules/ImageStatistics/mitkImageStatisticsConstants.h
@@ -1,62 +1,60 @@
 /*===================================================================
 
 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 _MITK_IMAGE_STATISTICS_CONSTANTS_H_
 #define _MITK_IMAGE_STATISTICS_CONSTANTS_H_
 
 #include <string>
 
 #include <MitkImageStatisticsExports.h>
 
 #ifdef _MSC_VER
 #  pragma warning(push)
 #  pragma warning(disable:4251)
 #endif
 
 namespace mitk
 {
 
   struct MITKIMAGESTATISTICS_EXPORT ImageStatisticsConstants
 
   {
-    static const std::string MEAN;
-    static const std::string MEDIAN;
-    static const std::string STANDARDDEVIATION;
-    static const std::string VARIANCE;
-    static const std::string RMS;
-    static const std::string MAXIMUM;
-    static const std::string MAXIMUMPOSITION;
-    static const std::string MINIMUM;
-    static const std::string MINIMUMPOSITION;
-    static const std::string NUMBEROFVOXELS;
-    static const std::string VOLUME;
-    static const std::string SKEWNESS;
-    static const std::string KURTOSIS;
-    static const std::string UNIFORMITY;
-    static const std::string ENTROPY;
-    static const std::string MPP;
-    static const std::string UPP;
-    static const std::string LABEL;
-    static const std::string HISTOGRAM;
+    static const std::string MEAN();
+    static const std::string MEDIAN();
+    static const std::string STANDARDDEVIATION();
+    static const std::string VARIANCE();
+    static const std::string RMS();
+    static const std::string MAXIMUM();
+    static const std::string MAXIMUMPOSITION();
+    static const std::string MINIMUM();
+    static const std::string MINIMUMPOSITION();
+    static const std::string NUMBEROFVOXELS();
+    static const std::string VOLUME();
+    static const std::string SKEWNESS();
+    static const std::string KURTOSIS();
+    static const std::string UNIFORMITY();
+    static const std::string ENTROPY();
+    static const std::string MPP();
+    static const std::string UPP();
 
   };
 }
 
 #ifdef _MSC_VER
 #  pragma warning(pop)
 #endif
 
 #endif