--- a
+++ b/lib/Helper.cpp
@@ -0,0 +1,19 @@
+#include "../includes/Helper.h"
+
+bool sitkImageToItkImage(sitk::Image &image, itk::Image< int, 3 >::Pointer itkImage)
+{
+    caster.SetOutputPixelType( sitk::sitkInt32 );
+    sitk::Image imageInt = caster.Execute( image );
+
+    itkImage->SetBufferedRegion( itkImage->GetLargestPossibleRegion() );
+    itkImage = dynamic_cast <itk::Image< int, 3 >*>( imageInt.GetITKBase() );
+    itkImage->DisconnectPipeline();
+
+    if ( itkImage.IsNull() )
+    {
+        std::cerr << "Unexpected error converting SimpleITK image to ITK image!" << std::endl;
+        return false;
+    }
+
+    return true;
+}