diff --git a/src/src/base/DICOMDirectoryHelper.cpp b/src/src/base/DICOMDirectoryHelper.cpp
index 252d9e9..082714c 100644
--- a/src/src/base/DICOMDirectoryHelper.cpp
+++ b/src/src/base/DICOMDirectoryHelper.cpp
@@ -10,6 +10,9 @@
 #include <vtkNew.h>
 #include <unordered_map>
 #include <algorithm>
+#include <vtkMath.h>
+#include <vtkMatrix4x4.h>
+
 struct DICOMTag{
     Uint16 group;
     Uint16 element;
@@ -70,6 +73,7 @@ void DICOMDirectoryHelper::getDirectoryProperties(const char * rootPath, DICOMFi
 
 void DICOMDirectoryHelper::getFileProperty(const std::string &path, DICOMFileMap& result) {
     DcmFileFormat file;
+    // read success!
     if (file.loadFile(path).good()) {
         DcmDataset *dataset = file.getDataset();
         std::string SeriesUID;
@@ -80,6 +84,7 @@ void DICOMDirectoryHelper::getFileProperty(const std::string &path, DICOMFileMap
         dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0012), AcquisitionNumber);
         long InstanceNumber = 0;
         dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0013), InstanceNumber);
+        // series be firstly loaded
         if (!result.count(SeriesUID)) {
             ExtendMedicalImageProperties *seriesProperty = ExtendMedicalImageProperties::New();
 
@@ -116,7 +121,7 @@ void DICOMDirectoryHelper::getFileProperty(const std::string &path, DICOMFileMap
             dataset->findAndGetFloat64(DcmTagKey(0x0028, 0x1051), WindowWidth);
             seriesProperty->AddWindowLevelPreset(WindowWidth, WindowCenter);
 
-            double Spacing[3] = {0.0, 0.0, 0.0};
+            double Spacing[3] = {0.0, 0.0, 1.0};
             dataset->findAndGetFloat64(DcmTagKey(0x0028, 0x0030), Spacing[0], 0);
             dataset->findAndGetFloat64(DcmTagKey(0x0028, 0x0030), Spacing[1], 1);
             seriesProperty->SetSpacing(Spacing);
@@ -172,7 +177,6 @@ void DICOMDirectoryHelper::Update() {
             auto files = (*iterator)->GetFileNames();
             std::vector<DICOMFileRefValue> vector;
             for (auto f : pair.second) {
-//                printf("%s\r\n",f.second.FilePath.c_str());
                 vector.emplace_back(std::move(f.second));
             }
             std::sort(vector.begin(), vector.end(), [](const DICOMFileRefValue &v1, const DICOMFileRefValue &v2) {
@@ -182,10 +186,9 @@ void DICOMDirectoryHelper::Update() {
                                 (v1.InstanceNumber < v2.InstanceNumber));
             });
             std::for_each(vector.begin(), vector.end(),[=](auto v){
-//                printf("%s\r\n",v.FilePath.c_str());
                 files->emplace_back(std::move(v.FilePath));
             });
-
+            readImageProperty(*iterator);
         }
     }
     SeriesCount = seriesProperties.size();
@@ -215,4 +218,96 @@ void DICOMDirectoryHelper::Clear() {
     SeriesCount = 0;
 }
 
+void DICOMDirectoryHelper::readImageProperty(ExtendMedicalImageProperties* property) {
+    std::vector<std::string> *files = property->GetFileNames();
+    DcmFileFormat file1;
+    // read success!
+    std::cout<<files->at(0)<<std::endl;
+    if (file1.loadFile(files->at(0)).good()) {
+        DcmDataset *dataset = file1.getDataset();
+
+        std::string SeriesUID;
+        dataset->findAndGetOFString(DcmTagKey(0x0020, 0x000e), SeriesUID);
+        long SeriesNumber = 0;
+        dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0011), SeriesNumber);
+        long AcquisitionNumber = 0;
+        dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0012), AcquisitionNumber);
+        long InstanceNumber = 0;
+        dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0013), InstanceNumber);
+        std::cout<<"file1:"<<SeriesUID<<", "<<SeriesNumber<<", "<<AcquisitionNumber<<", "<<InstanceNumber<<std::endl;
+
+        double Spacing[3] = {0.0, 0.0, -1.0};
+        dataset->findAndGetFloat64(DcmTagKey(0x0028, 0x0030), Spacing[0], 0);
+        dataset->findAndGetFloat64(DcmTagKey(0x0028, 0x0030), Spacing[1], 1);
+        property->SetSpacing(Spacing);
+
+        double orientation[6] = {.0, .0, .0, .0, .0, .0};
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0037), orientation[0], 0);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0037), orientation[1], 1);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0037), orientation[2], 2);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0037), orientation[3], 3);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0037), orientation[4], 4);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0037), orientation[5], 5);
+        property->SetDirectionCosine(orientation);
+
+        double position[3] = {.0, .0, .0};
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[0], 0);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[1], 1);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[2], 2);
+        property->SetPosition(position);
+    }
+    double *d = property->GetDirectionCosine();
+    double xVector[3] = {d[0], d[1], d[2]};
+    double yVector[3] = {d[3], d[4], d[5]};
+    double zVector[3] = {0, 0, 0};
+    vtkMath::Cross(xVector, yVector, zVector);
+    auto  matrix = property->GetModelToWorldMatrix();
+    matrix->Identity();
+    matrix->SetElement( 0,0, xVector[0]);
+    matrix->SetElement( 1,0, xVector[1]);
+    matrix->SetElement( 2,0, xVector[2]);
+    matrix->SetElement( 0,1, yVector[0]);
+    matrix->SetElement( 1,1, yVector[1]);
+    matrix->SetElement( 2,1, yVector[2]);
+    matrix->SetElement( 0,2, zVector[0]);
+    matrix->SetElement( 1,2, zVector[1]);
+    matrix->SetElement( 2,2, zVector[2]);
+
+    vtkMatrix4x4::Invert(matrix, property->GetWorldToModelMatrix() );
+    matrix = property->GetWorldToModelMatrix();
+    DcmFileFormat file2;
+    std::cout<<files->at(1)<<std::endl;
+
+    // read success!
+    if (file2.loadFile(files->at(1)).good()) {
+        DcmDataset *dataset = file2.getDataset();
+        std::string SeriesUID;
+        dataset->findAndGetOFString(DcmTagKey(0x0020, 0x000e), SeriesUID);
+        std::string SeriesDes;
+        dataset->findAndGetOFString(DcmTagKey(0x0008, 0x103e), SeriesDes);
+        long SeriesNumber = 0;
+        dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0011), SeriesNumber);
+        long AcquisitionNumber = 0;
+        dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0012), AcquisitionNumber);
+        long InstanceNumber = 0;
+        dataset->findAndGetSint32(DcmTagKey(0x0020, 0x0013), InstanceNumber);
+        double position[3] = {.0, .0, .0};
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[0], 0);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[1], 1);
+        dataset->findAndGetFloat64(DcmTagKey(0x0020, 0x0032), position[2], 2);
+        double position0[3] ={property->GetPosition()[0], property->GetPosition()[1] , property->GetPosition()[2]};
+        double zNormal[4] = {  position[0] - position0[0],
+                             position[1] - position0[1],
+                             position[2] - position0[2], 1.0};
+        double space2 = sqrt(vtkMath::Distance2BetweenPoints(position, property->GetPosition()));
+        vtkMath::Normalize(zNormal);
+        double Spacing[3] = {.0, .0, .0};
+        property->GetSpacing(Spacing);
+        double zNormal2[4] = {.0,.0,.0,1.0};
+        matrix->MultiplyPoint(zNormal, zNormal2);
+        Spacing[2] = zNormal2[2]<0?(-1.0*space2):space2;
+        property->SetSpacing(Spacing);
+    }
+}
+
 
diff --git a/src/src/base/DICOMDirectoryHelper.h b/src/src/base/DICOMDirectoryHelper.h
index 37dee3f..859ff16 100644
--- a/src/src/base/DICOMDirectoryHelper.h
+++ b/src/src/base/DICOMDirectoryHelper.h
@@ -55,6 +55,7 @@ private:
                                 DICOMFileMap &result);
 
     void getFileProperty(const std::string &path, DICOMFileMap &result);
+    void readImageProperty(ExtendMedicalImageProperties* property);
 };