diff --git a/Modules/RectifyImage/cmdapps/RectifyImageMiniApp.cpp b/Modules/RectifyImage/cmdapps/RectifyImageMiniApp.cpp
index 5ca837e0bb..305cbcbee1 100644
--- a/Modules/RectifyImage/cmdapps/RectifyImageMiniApp.cpp
+++ b/Modules/RectifyImage/cmdapps/RectifyImageMiniApp.cpp
@@ -1,180 +1,194 @@
 /*===================================================================
 
 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 <mitkCommandLineParser.h>
 #include <mitkImagePixelReadAccessor.h>
 #include <mitkImagePixelWriteAccessor.h>
 #include <mitkIOUtil.h>
 
 template <typename TPixelType>
 void RectifyImage(mitk::Image::Pointer inputImage, mitk::Image::Pointer outputImage)
 {
   mitk::ImagePixelReadAccessor<TPixelType, 3> pixelReadAccess(inputImage);
   mitk::ImagePixelWriteAccessor<TPixelType, 3> pixelWriteAccess(outputImage);
 
   const auto DEPTH = static_cast<itk::IndexValueType>(outputImage->GetDimension(2));
   const auto HEIGHT = static_cast<itk::IndexValueType>(outputImage->GetDimension(1));
   const auto WIDTH = static_cast<itk::IndexValueType>(outputImage->GetDimension(0));
 
   auto geometry = outputImage->GetGeometry();
   itk::Index<3> index;
   mitk::Point3D worldCoords;
 
   for (index[2] = 0; index[2] < DEPTH; ++index[2])
   {
     for (index[1] = 0; index[1] < HEIGHT; ++index[1])
     {
       for (index[0] = 0; index[0] < WIDTH; ++index[0])
       {
         geometry->IndexToWorld(index, worldCoords);
         pixelWriteAccess.SetPixelByIndex(index, pixelReadAccess.GetPixelByWorldCoordinates(worldCoords));
       }
     }
   }
 }
 
 int main(int argc, char* argv[])
 {
   mitkCommandLineParser parser;
 
   parser.setTitle("Rectify Image");
   parser.setCategory("Preprocessing Tools");
   parser.setDescription("Resample image based on standard world to index transform");
   parser.setContributor("MBI");
 
   parser.setArgumentPrefix("--", "-");
   parser.addArgument("input", "i", mitkCommandLineParser::InputImage, "Input Image", "Path to input image", us::Any(), false);
   parser.addArgument("output", "o", mitkCommandLineParser::OutputFile, "Output Image", "Path to output image", us::Any(), false);
 
   auto parsedArgs = parser.parseArguments(argc, argv);
 
   if (2 != parsedArgs.size() || 0 == parsedArgs.count("input") || 0 == parsedArgs.count("output"))
     return EXIT_FAILURE;
 
   auto inputImagePath = us::any_value_to_string(parsedArgs["input"]);
   mitk::Image::Pointer inputImage;
 
   try
   {
     inputImage = dynamic_cast<mitk::Image*>(mitk::IOUtil::Load(inputImagePath)[0].GetPointer());
   }
   catch (const mitk::Exception&)
   {
     return EXIT_FAILURE;
   }
 
   if (3 != inputImage->GetDimension())
   {
     MITK_ERROR << "Only 3-d images are supported.";
     return EXIT_FAILURE;
   }
 
   auto inputGeometry = inputImage->GetGeometry();
 
   mitk::Point3D minInputIndex;
   mitk::FillVector3D(minInputIndex, 0.0, 0.0, 0.0);
 
   mitk::Point3D minInputIndexInWorld;
   inputGeometry->IndexToWorld(minInputIndex, minInputIndexInWorld);
 
   mitk::Point3D maxInputIndex;
   for (int i = 0; i < 3; ++i)
     maxInputIndex[i] = inputGeometry->GetExtent(i) - 1;
 
   mitk::Point3D maxInputIndexInWorld;
   inputGeometry->IndexToWorld(maxInputIndex, maxInputIndexInWorld);
 
   mitk::Point3D minOutputIndexInWorld;
   for (int i = 0; i < 3; ++i)
     minOutputIndexInWorld[i] = std::min(minInputIndexInWorld[i], maxInputIndexInWorld[i]);
 
   mitk::Point3D maxOutputIndexInWorld;
   for (int i = 0; i < 3; ++i)
     maxOutputIndexInWorld[i] = std::max(minInputIndexInWorld[i], maxInputIndexInWorld[i]);
 
-  mitk::Vector3D outputExtent = maxOutputIndexInWorld - minOutputIndexInWorld + 1;
+  mitk::Vector3D spacing = inputGeometry->GetSpacing();
+  auto transform = inputGeometry->GetIndexToWorldTransform()->Clone();
+  auto matrix = transform->GetMatrix();
+
+  for (int i = 0; i < 3; ++i)
+  {
+    for (int j = 0; j < 3; ++j)
+    {
+      matrix[i][j] = std::abs(matrix[i][j]) / spacing[j];
+    }
+  }
+
+  transform->SetMatrix(matrix);
+  spacing = transform->TransformVector(spacing);
+
+  mitk::Vector3D outputExtent = (maxOutputIndexInWorld - minOutputIndexInWorld + spacing);
+  for (int i = 0; i < 3; ++i)
+    outputExtent[i] /= spacing[i];
 
   mitk::Point3D origin = minOutputIndexInWorld;
 
   mitk::Vector3D right;
   mitk::FillVector3D(right, outputExtent[0], 0.0, 0.0);
 
   mitk::Vector3D down;
   mitk::FillVector3D(down, 0.0, outputExtent[1], 0.0);
 
-  mitk::Vector3D spacing;
-  mitk::FillVector3D(spacing, 1.0, 1.0, 1.0);
-
   auto planeGeometry = mitk::PlaneGeometry::New();
   planeGeometry->InitializeStandardPlane(right, down, &spacing);
   planeGeometry->SetOrigin(origin);
   planeGeometry->SetImageGeometry(true);
 
   auto slicedGeometry = mitk::SlicedGeometry3D::New();
   slicedGeometry->InitializeEvenlySpaced(planeGeometry, static_cast<unsigned int>(outputExtent[2]));
 
   auto outputGeometry = mitk::ProportionalTimeGeometry::New();
   outputGeometry->SetTimeStepGeometry(slicedGeometry, 0);
 
   auto pixelType = inputImage->GetPixelType();
 
   auto outputImage = mitk::Image::New();
   outputImage->Initialize(pixelType, *outputGeometry);
 
   try
   {
     switch (pixelType.GetComponentType())
     {
       case itk::ImageIOBase::CHAR:
         RectifyImage<char>(inputImage, outputImage);
         break;
 
       case itk::ImageIOBase::UCHAR:
         RectifyImage<unsigned char>(inputImage, outputImage);
         break;
 
       case itk::ImageIOBase::SHORT:
         RectifyImage<short>(inputImage, outputImage);
         break;
 
       case itk::ImageIOBase::USHORT:
         RectifyImage<unsigned short>(inputImage, outputImage);
         break;
 
       default:
         MITK_ERROR << "Pixel type is not supported.";
         return EXIT_FAILURE;
     }
   }
   catch (const mitk::Exception &e)
   {
     MITK_ERROR << e.GetDescription();
     return EXIT_FAILURE;
   }
 
   auto outputImagePath = us::any_value_to_string(parsedArgs["output"]);
 
   try
   {
     mitk::IOUtil::Save(outputImage, outputImagePath);
   }
   catch (const mitk::Exception &)
   {
     return EXIT_FAILURE;
   }
 
   return EXIT_SUCCESS;
 }