diff --git a/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.h b/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.h
index 44e35582390..1e17633f0c8 100644
--- a/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.h
+++ b/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.h
@@ -20,6 +20,7 @@
 
 #include "itkImageToImageFilter.h"
 #include <vector>
+#include <memory> // For unique_ptr.
 
 namespace itk
 {
@@ -167,7 +168,7 @@ class ITK_TEMPLATE_EXPORT AttributeMorphologyBaseImageFilter : public ImageToIma
   static constexpr OffsetValueType ACTIVE = -2;
 
   // Just used for area/volume openings at the moment
-  AttributeType * m_AuxData;
+  std::unique_ptr<AttributeType[]> m_AuxData;
 
   using OffsetVecType = std::vector<OffsetType>;
   // offset in the linear array.
@@ -180,11 +181,11 @@ class ITK_TEMPLATE_EXPORT AttributeMorphologyBaseImageFilter : public ImageToIma
   // it is sorted with a stable sort by grey level as the
   // first step in the algorithm. The sorting step avoids
   // the need to explicitly locate regional extrema.
-  OffsetValueType * m_SortPixels;
-  OffsetValueType * m_Parent;
+  std::unique_ptr<OffsetValueType[]> m_SortPixels;
+  std::unique_ptr<OffsetValueType[]> m_Parent;
 
   // This is a bit ugly, but I can't see an easy way around
-  InputPixelType * m_Raw;
+  std::unique_ptr<InputPixelType[]> m_Raw;
 
   class CompareOffsetType
   {
diff --git a/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.hxx b/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.hxx
index 97f95aa9a48..9d414ff80f0 100644
--- a/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.hxx
+++ b/Modules/Nonunit/Review/include/itkAttributeMorphologyBaseImageFilter.hxx
@@ -24,6 +24,7 @@
 #include "itkConnectedComponentAlgorithm.h"
 #include "itkNeighborhoodAlgorithm.h"
 #include "itkCastImageFilter.h"
+#include "itkMakeUniqueForOverwrite.h"
 
 /*
  * This code was contributed in the Insight Journal paper
@@ -97,12 +98,12 @@ AttributeMorphologyBaseImageFilter<TInputImage, TOutputImage, TAttribute, TFunct
 
   fit = faceList.begin();
 
-  m_SortPixels = new OffsetValueType[buffsize];
-  m_Parent = new OffsetValueType[buffsize];
+  m_SortPixels = make_unique_for_overwrite<OffsetValueType[]>(buffsize);
+  m_Parent = make_unique_for_overwrite<OffsetValueType[]>(buffsize);
 
   // This is a bit ugly, but I can't see an easy way around
-  m_Raw = new InputPixelType[buffsize];
-  m_AuxData = new AttributeType[buffsize];
+  m_Raw = make_unique_for_overwrite<InputPixelType[]>(buffsize);
+  m_AuxData = make_unique_for_overwrite<AttributeType[]>(buffsize);
 
   // copy the pixels to the sort buffer
   using CRegionIteratorType = ImageRegionConstIteratorWithIndex<TInputImage>;
@@ -120,7 +121,7 @@ AttributeMorphologyBaseImageFilter<TInputImage, TOutputImage, TAttribute, TFunct
     progress.CompletedPixel();
   }
   progress.CompletedPixel();
-  m_CompareOffset.buf = m_Raw;
+  m_CompareOffset.buf = m_Raw.get();
   std::stable_sort(&(m_SortPixels[0]), &(m_SortPixels[buffsize - 1]), m_CompareOffset);
   progress.CompletedPixel();
 
@@ -198,10 +199,10 @@ AttributeMorphologyBaseImageFilter<TInputImage, TOutputImage, TAttribute, TFunct
     progress.CompletedPixel();
   }
 
-  delete[] m_Raw;
-  delete[] m_SortPixels;
-  delete[] m_Parent;
-  delete[] m_AuxData;
+  m_Raw.reset();
+  m_SortPixels.reset();
+  m_Parent.reset();
+  m_AuxData.reset();
 }
 
 template <typename TInputImage, typename TOutputImage, typename TAttribute, typename TFunction>
diff --git a/Modules/Nonunit/Review/include/itkDirectFourierReconstructionImageToImageFilter.hxx b/Modules/Nonunit/Review/include/itkDirectFourierReconstructionImageToImageFilter.hxx
index 8866e61360b..d78df126cb5 100644
--- a/Modules/Nonunit/Review/include/itkDirectFourierReconstructionImageToImageFilter.hxx
+++ b/Modules/Nonunit/Review/include/itkDirectFourierReconstructionImageToImageFilter.hxx
@@ -18,6 +18,7 @@
 #ifndef itkDirectFourierReconstructionImageToImageFilter_hxx
 #define itkDirectFourierReconstructionImageToImageFilter_hxx
 
+#include "itkMakeUniqueForOverwrite.h"
 
 namespace itk
 {
@@ -214,7 +215,7 @@ DirectFourierReconstructionImageToImageFilter<TInputImage, TOutputImage>::Genera
   FFT->SetInput(projectionLine);
 
   // Setup FFT Line interpolator stack
-  auto * FFTLineInterpolator = new FFTLineInterpolatorType::Pointer[alpha_size];
+  const auto FFTLineInterpolator = make_unique_for_overwrite<FFTLineInterpolatorType::Pointer[]>(alpha_size);
   for (unsigned int alpha = 0; alpha < alpha_size; ++alpha)
   {
     FFTLineInterpolator[alpha] = FFTLineInterpolatorType::New();
@@ -413,8 +414,6 @@ DirectFourierReconstructionImageToImageFilter<TInputImage, TOutputImage>::Genera
 
     inputIt.NextSlice();
   } // while ( !inputIt.IsAtEnd() )
-
-  delete[] FFTLineInterpolator;
 }
 } // namespace itk