diff --git a/src/src/IO/DICOM/DICOMHeaderHelper.cpp b/src/src/IO/DICOM/DICOMHeaderHelper.cpp
index 68c04ac..da0940e 100644
--- a/src/src/IO/DICOM/DICOMHeaderHelper.cpp
+++ b/src/src/IO/DICOM/DICOMHeaderHelper.cpp
@@ -302,7 +302,7 @@ void DICOMHeaderHelper::ArrangeSeriesProperty() {
             //sort every image set with world coordinate position
             std::sort(item.second.begin() + beginOffset, item.second.begin() + splitIndex[j],
                       [](auto v1, auto v2) {
-                          return v1.image_position > v2.image_position;
+                          return v1.image_position < v2.image_position;
                       });
             auto p = createProperty(item.second, splitIndex[j], beginOffset);
             p->SetImageSetNumber(imageSetNumber);
@@ -314,12 +314,14 @@ void DICOMHeaderHelper::ArrangeSeriesProperty() {
         //sort the last image set
         std::sort(item.second.begin() + beginOffset, item.second.end(),
                   [](auto v1, auto v2) {
-                      return v1.image_position > v2.image_position;
+                      return v1.image_position < v2.image_position;
                   });
         auto p = createProperty(item.second, item.second.size(), beginOffset);
-        p->SetImageSetNumber(imageSetNumber);
-        p->GenerateUniqueID();
-        if (p)seriesProperties.push_back(p);
+        if (p){
+            p->SetImageSetNumber(imageSetNumber);
+            p->GenerateUniqueID();
+            seriesProperties.push_back(p);
+        }
     }
 }
 
@@ -429,7 +431,7 @@ ExtendMedicalImageProperties* DICOMHeaderHelper::createProperty(const std::vecto
                 }
             }
         }
-        property->SetSpacing(header.Spacing[0],header.Spacing[1],-thickness);
+        property->SetSpacing(header.Spacing[0],header.Spacing[1],thickness);
 
         // read data allocate reference param
         unsigned short bitsAllocated= 1;
@@ -470,7 +472,6 @@ ExtendMedicalImageProperties* DICOMHeaderHelper::createProperty(const std::vecto
         property->SetRescaleOffset(RescaleOffset);
     }
     else{
-        printf( " file:%s  load error!\r\b", header.FilePath.c_str() );
         property->Delete();
         return nullptr;
     }
@@ -478,8 +479,8 @@ ExtendMedicalImageProperties* DICOMHeaderHelper::createProperty(const std::vecto
         // try to use real world slice origin point distance to instead thickness
         const DICOMFileHeader& header2 = headerList[beginOffset+1];
         double spacing2 = sqrt(vtkMath::Distance2BetweenPoints(header.Position,header2.Position));
-        if((int)spacing2 != 0){
-            property->SetSpacing(property->GetSpacing()[0],property->GetSpacing()[1],-spacing2);
+        if(spacing2 > .0){
+            property->SetSpacing(property->GetSpacing()[0],property->GetSpacing()[1],spacing2);
         }
     }
     return property;
diff --git a/src/src/Rendering/Viewer/DICOMImageViewer.cxx b/src/src/Rendering/Viewer/DICOMImageViewer.cxx
index a12b8de..0a58308 100644
--- a/src/src/Rendering/Viewer/DICOMImageViewer.cxx
+++ b/src/src/Rendering/Viewer/DICOMImageViewer.cxx
@@ -235,8 +235,6 @@ void DICOMImageViewer::SetInputData(vtkImageData *in) {
     this->RemoveFusionData();
     this->ActiveRuler();
     this-> ActiveReferenceLine();
-    double zVec = in->GetSpacing()[2];
-    defaultProjection[2][2] = zVec>0.0?1.0:-1.0;
 }
 
 void DICOMImageViewer::SetInputConnection(vtkAlgorithmOutput *input) {
diff --git a/src/src/Rendering/Viewer/ResliceImageViewer.cpp b/src/src/Rendering/Viewer/ResliceImageViewer.cpp
index a91378e..307a2fd 100644
--- a/src/src/Rendering/Viewer/ResliceImageViewer.cpp
+++ b/src/src/Rendering/Viewer/ResliceImageViewer.cpp
@@ -297,14 +297,6 @@ void ResliceImageViewer::SetCoordsTransformMatrix(vtkMatrix4x4 *matrix4X4) {
     OrientationMatrix->DeepCopy(matrix4X4);
 
     OrientationMatrix->Invert();
-
-    //TODO:暂时使用特殊处理解决负向堆叠问题，考虑如何去除特殊处理
-    //默认的横断面Slice 需要考虑奇葩的负向堆叠
-    if (OrientationMatrix->IsIdentity()){
-        double zVec = Mapper->GetInput()->GetSpacing()[2];
-        OrientationMatrix->SetElement(2,2, zVec>0.0?1.0:-1.0);
-    }
-
 }
 
 void ResliceImageViewer::updateHandle(vtkObject* sender, unsigned long eventID, void* callData) {