diff --git a/src/src/base/DicomLoader.cpp b/src/src/base/DicomLoader.cpp
index 0ba5007..96e32c4 100644
--- a/src/src/base/DicomLoader.cpp
+++ b/src/src/base/DicomLoader.cpp
@@ -6,6 +6,7 @@
 #include "DICOMDirectoryHelper.h"
 #include "ExtendMedicalImageProperties.h"
 #include "vtkDICOMImageReader2.h"
+#include "vtkImageData.h"
 #include <map>
 #include <algorithm>
 #include <vtkStringArray.h>
@@ -105,14 +106,14 @@ DicomLoader::DicomLoader():m_addType(AddDicomType::DUPLICATE_TYPE) {
 //	m_inputNames = InputNamesGeneratorType::New();
 
     DICOMHelper = new DICOMDirectoryHelper;
-    reader = vtkDICOMImageReader2::New();
+    reader = nullptr;
 	//transfer to series after!
 	m_patients.clear();
 
 }
 DicomLoader::~DicomLoader() {
     delete DICOMHelper;
-    reader->Delete();
+    if (reader)reader->Delete();
     reader = nullptr;
 	delete instance;
 }
@@ -199,8 +200,8 @@ void DicomLoader::InitFromRead(SeriesInstance* instance)//, DicomTagInfo_t* tag_
 
 	//////////////////////////////////////////////////////////////////////////
 	//You have to use DeepCopy on this condition,otherwise, the previous image will be flushed.
-	instance->m_image->DeepCopy(reader->GetOutput());
-	//instance->m_image = m_itkConnector->GetOutput();
+
+	instance->m_image = reader->GetOutput();
 
 	if (instance->getUniqueID()->open_mode == DIR_OPEN_MODE)
 	{
@@ -209,6 +210,9 @@ void DicomLoader::InitFromRead(SeriesInstance* instance)//, DicomTagInfo_t* tag_
             instance->m_fileNames.push_back(v);
         });
 	}
+    reader->Delete();
+
+    reader = nullptr;
 }
 
 //You may not use const & cause intance may be deleted during this func
@@ -565,6 +569,8 @@ void DicomLoader::ItkPreReadSeries(const std::string &dicomName, SeriesOpenMode
 	DICOMHelper->Update();
 	if(DICOMHelper->GetSeriesCount()>0){
         currentImageProperty =  DICOMHelper->GetSeries(0);
+        if (reader) reader->Delete();
+        reader = vtkDICOMImageReader2::New();
         reader->SetFileNames(*(currentImageProperty->GetFileNames()));
         reader->Update();
     }