diff --git a/src/src/base/ExtendMedicalImageProperties.h b/src/src/base/ExtendMedicalImageProperties.h
index d2a13cc..15b1296 100644
--- a/src/src/base/ExtendMedicalImageProperties.h
+++ b/src/src/base/ExtendMedicalImageProperties.h
@@ -31,8 +31,11 @@ public:
     vtkGetMacro(SamplePerPixel, unsigned short)
     vtkSetMacro(SamplePerPixel, unsigned short)
 
-    vtkSetVector2Macro(Spacing,double);
-    vtkGetVector2Macro(Spacing,double);
+    vtkSetVector3Macro(Spacing,double);
+    vtkGetVector3Macro(Spacing,double);
+
+    vtkSetVector3Macro(Position,double);
+    vtkGetVector3Macro(Position,double);
 
     std::vector<std::string>* GetFileNames(){
         return  &FileNames;
@@ -75,7 +78,8 @@ protected:
     ~ExtendMedicalImageProperties() override;
     char * StudyUID = nullptr;
     char * SeriesUID = nullptr;
-    double Spacing[2] ={1.0,1.0};
+    double Spacing[3] ={1.0,1.0,1.0};
+    double Position[3] ={.0,.0,.0};
     long AcquisitionNumber = 0;
     unsigned short SamplePerPixel;
     std::vector<std::string> FileNames;