Loading a DICOMDIR and Using it to Create a 3D Object

In this tutorial you will learn how to create a 3D object.

Start Visual Studio 2005 or later

Choose File->New->Project... from the menu.
In the New Project dialog box, choose Visual C#->Windows Forms Application.
Type the project name as "Loading a DICOMDIR to Create a 3D Object" in the Project Name field, and then choose OK. If desired, type a new location for your project or select a directory using the Browse button, and then choose OK.
From View menu > choose Solution explorer.
On the Solution explorer tree, right click on the References node and select Add Reference.
On the Add Reference dialog, select the Browse tab, and add the following dll's.
- Leadtools.dll
- Leadtools.Codecs.dll
- Leadtools.MedicalViewer.dll
- Leadtools.Medical3D.dll
- Leadtools.Dicom.dll
- Leadtools.Codecs.Cmp.dll

Switch to Form1 code view (right-click Form1 in the solution explorer then select View Code ) and add the following lines at the beginning of the file:

      Imports Leadtools 
      Imports Leadtools.Codecs 
      Imports Leadtools.MedicalViewer 
      Imports Leadtools.Medical3D 
      Imports Leadtools.Dicom

      using Leadtools; 
      using Leadtools.Codecs; 
      using Leadtools.MedicalViewer; 
      using Leadtools.Medical3D; 
      using Leadtools.Dicom;

In Form1 create a new method InitClass()

      Private Sub InitClass() 
         Dim MY_LICENSE_FILE As String = "d:\temp\TestLic.lic" 
                      
         ' Unlock DICOM support 
         Dim MY_DicomDEVELOPER_KEY As String = "xyz123abc" 
         RasterSupport.SetLicense(MY_LICENSE_FILE, MY_DicomDEVELOPER_KEY); 
                      
         ' Unlock Medical support 
         Dim MY_MedicalDEVELOPER_KEY As String = "abc123xyz" 
         RasterSupport.SetLicense(MY_LICENSE_FILE, MY_MedicalDEVELOPER_KEY); 
                      
         ' Unlock Medical 3D support 
         Dim MY_3DDEVELOPER_KEY As String = "123xyzabc" 
         RasterSupport.SetLicense(MY_LICENSE_FILE, MY_3DDEVELOPER_KEY); 
                      
         ' Create a new instance of the codecs class, which will be used to load the images. 
         Dim _codecs As RasterCodecs = New RasterCodecs() 
         ' Create a new instance of the Medical Viewer, the layout will be divided to 2X2. 
         Dim viewer As MedicalViewer = New MedicalViewer(2, 2) 
         ' Fit the view to the whole form 
         viewer.Dock = DockStyle.Fill 
         ' Create the 3D control that will hold the 3D object. 
         Dim control3D As Medical3DControl = New Medical3DControl() 
         ' Add and set 3D action 
         control3D.AddAction(MedicalViewerActionType.WindowLevel) 
         control3D.SetAction(MedicalViewerActionType.WindowLevel, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active) 
         ' Load any multi frame image (with number of frames more than 3) and add it to the Image property of the cell. 
         Dim object3D As Medical3DObject = New Medical3DObject() 
         ' Add the newly created 3D object to the control. 
         control3D.ObjectsContainer.Objects.Add(object3D) 
         ' Add the cell above to the MedicalViewer. 
         viewer.Cells.Add(control3D) 
         ' add the viewer to the from control. 
         Controls.Add(viewer) 
      End Sub

      void InitClass() 
      { 
         string MY_LICENSE_FILE = "d:\\temp\\TestLic.lic"; 
                    
         // Unlock DICOM support 
         string MY_DicomDEVELOPER_KEY = "xyz123abc"; 
         RasterSupport.SetLicense(MY_LICENSE_FILE, MY_DicomDEVELOPER_KEY); 
                      
         // Unlock Medical support 
         string MY_MedicalDEVELOPER_KEY = "abc123xyz"; 
         RasterSupport.SetLicense(MY_LICENSE_FILE, MY_MedicalDEVELOPER_KEY); 
                      
         // Unlock Medical 3D support 
         string MY_3DDEVELOPER_KEY = "123xyzabc"; 
         RasterSupport.SetLicense(MY_LICENSE_FILE, MY_3DDEVELOPER_KEY); 
                    
         // Create a new instance of the codecs class, which will be used to load the images. 
         RasterCodecs _codecs = new RasterCodecs(); 
         // Create a new instance of the Medical Viewer, the layout will be divided to 2X2. 
         MedicalViewer viewer = new MedicalViewer(2, 2); 
         // Fit the view to the whole form 
         viewer.Dock = DockStyle.Fill; 
         // Create the 3D control that will hold the 3D object. 
         Medical3DControl control3D = new Medical3DControl(); 
         // Add and set 3D action 
         control3D.AddAction(MedicalViewerActionType.WindowLevel); 
         control3D.SetAction(MedicalViewerActionType.WindowLevel, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active); 
         // Load any multi frame image (with number of frames more than 3) and add it to the Image property of the cell. 
         Medical3DObject object3D = new Medical3DObject(); 
         // Add the newly created 3D object to the control. 
         control3D.ObjectsContainer.Objects.Add(object3D); 
         // the cell above to the MedicalViewer. 
         viewer.Cells.Add(control3D); 
         // Add the viewer to the from control. 
         Controls.Add(viewer); 
      }

Call the InitClass method from inside the Form1 constructor, place the call add it after InitializeComponent().
Run the program now, you will see a 2X2 layout with one of the filled with an empty 3D object.
Now you will need to have a set of DICOMDIR files for the next step. We provide DICOMDIR sample files. Download the file from here (Download chest_ct_compressed_subset_for_3d_tutorial.zip), and extract the file to "C:\Leadtools_DICOMDIR".

Add the following code to your project right under the initclass(). This code will load a specific study and series from the downloaded DICOMDIR file. Note:There is an sample dialog "SeriesBrowser" that can be found in the \Examples\DotNet\<VB or CS>\Common folder, which will do all the work below. For more information, refer to the Main3DDemo source code.

Private _studyElement As DicomElement 
Private _seriesElement As DicomElement 
Private _seriesManager As MedicalViewerSeriesManager 
Private _imageDataList As List(Of MedicalViewerImageData) 
Private doubleArray As Double() 
Private patientElement As DicomElement 
Private referenceUID As String 
Private imageElement As DicomElement 
Private output As MedicalViewerSeriesManager 
' Find the study using the Study instance UID, and return it's DicomElement if the study is found 
Private Function FindStudy(ByVal ds As DicomDataSet, ByVal studyInstanceUID As String) As DicomElement 
   ' get the parent element. 
   Dim patientElement As DicomElement = ds.GetFirstKey(Nothing, True) 
   Dim studyElement As DicomElement = Nothing 
   Dim studyInformationElement As DicomElement = Nothing 
   Dim studyID As String 
   studyElement = ds.GetChildKey(patientElement) 
   studyElement = ds.GetChildElement(studyElement, True) 
   Do While Not studyElement Is Nothing 
      studyInformationElement = ds.FindFirstElement(studyElement, DicomTag.StudyInstanceUID, True) 
      If Not studyInformationElement Is Nothing Then 
        studyID = ds.GetConvertValue(studyInformationElement) 
        If studyID = studyInstanceUID Then 
           Return studyInformationElement 
        End If 
      End If 
      studyElement = ds.GetNextKey(studyElement, True) 
      studyElement = ds.GetChildElement(studyElement, True) 
   Loop 
   Return Nothing 
End Function 
' Find the series using the Series instance UID, and return it's DicomElement if the series is found 
Private Function FindSeries(ByVal ds As DicomDataSet, ByVal studyElement As DicomElement, ByVal seriesInstanceUID As String) As DicomElement 
   Dim seriesElement As DicomElement = Nothing 
   Dim seriesInformationElement As DicomElement = Nothing 
   Dim seriesID As String 
   seriesElement = ds.GetChildKey(studyElement) 
   seriesElement = ds.GetChildElement(seriesElement, True) 
   Do While Not seriesElement Is Nothing 
      seriesInformationElement = ds.FindFirstElement(seriesElement, DicomTag.SeriesInstanceUID, True) 
      If Not seriesInformationElement Is Nothing Then 
        seriesID = ds.GetConvertValue(seriesInformationElement) 
        If seriesID = seriesInstanceUID Then 
           Return seriesInformationElement 
        End If 
      End If 
      seriesElement = ds.GetNextKey(seriesElement, True) 
      seriesElement = ds.GetChildElement(seriesElement, True) 
   Loop 
   Return Nothing 
End Function 
  ' return the first frame file name of the series. 
  Private Function GetFirstImageName(ByVal ds As DicomDataSet, ByVal seriesElement As DicomElement, ByVal directoryPath As String, <System.Runtime.InteropServices.Out()> ByRef imageElement As DicomElement) As String 
   Dim imageIDElement As DicomElement = Nothing 
   imageElement = ds.GetChildKey(seriesElement) 
   imageElement = ds.GetChildElement(imageElement, True) 
   Do While Not imageElement Is Nothing 
      imageIDElement = ds.FindFirstElement(imageElement, DicomTag.ReferencedFileID, True) 
      If Not imageIDElement Is Nothing Then 
        Return directoryPath & "\" & ds.GetConvertValue(imageIDElement) 
      End If 
   Loop 
   Return "" 
  End Function 
  ' return the next frame file name of the series. 
  Private Function GetNextImageName(ByVal ds As DicomDataSet, ByVal directoryPath As String, ByRef imageElement As DicomElement) As String 
    Dim nextImageElement As DicomElement = Nothing 
    imageElement = ds.GetNextKey(imageElement, True) 
    imageElement = ds.GetChildElement(imageElement, True) 
    Do While Not imageElement Is Nothing 
      nextImageElement = ds.FindFirstElement(imageElement, DicomTag.ReferencedFileID, True) 
      If Not imageElement Is Nothing Then 
        Dim echoElement As DicomElement = ds.FindFirstElement(imageElement, DicomTag.EchoNumber, True) 
        Return directoryPath & "\" & ds.GetConvertValue(nextImageElement) 
      End If 
    Loop 
    Return "" 
  End Function 
  ' This will load the dicom data set information and save it into a new instance of the class MedicalViewerImageData. 
  Private Function AddImageToImageArray(ByVal ds As DicomDataSet, ByVal index As Integer, ByVal imagePath As String, <System.Runtime.InteropServices.Out()> ByRef echoNumber As Integer) As Boolean 
    echoNumber = -1 
    Dim imageData As MedicalViewerImageData = New MedicalViewerImageData() 
    patientElement = ds.FindFirstElement(Nothing, DicomTag.ImagePositionPatient, True) 
    doubleArray = ds.GetDoubleValue(patientElement, 0, 3) 
    imageData.ImagePosition = Point3D.FromDoubleArray(doubleArray) 
    imageData.Data = imagePath 
    imageData.EchoNumber = echoNumber 
    patientElement = ds.FindFirstElement(Nothing, DicomTag.FrameOfReferenceUID, True) 
    referenceUID = ds.GetConvertValue(patientElement) 
    imageData.FrameOfReferenceUID = referenceUID 
    patientElement = ds.FindFirstElement(Nothing, DicomTag.ImageOrientationPatient, True) 
    imageData.ImageOrientation = ds.GetConvertValue(patientElement) 
    patientElement = ds.FindFirstElement(Nothing, DicomTag.PixelSpacing, True) 
    doubleArray = ds.GetDoubleValue(patientElement, 0, 2) 
    imageData.PixelSpacing = New Point2D(CSng(doubleArray(0)), CSng(doubleArray(1))) 
    patientElement = ds.FindFirstElement(Nothing, DicomTag.InstanceNumber, True) 
    If Not patientElement Is Nothing Then 
      imageData.InstanceNumber = Convert.ToInt32(ds.GetConvertValue(patientElement)) 
    End If 
    patientElement = ds.FindFirstElement(Nothing, DicomTag.InstanceCreationTime, True) 
    If Not patientElement Is Nothing Then 
      imageData.CaptureTime = Convert.ToDateTime(ds.GetConvertValue(patientElement)) 
    End If 
    _imageDataList.Add(imageData) 
    Return True 
  End Function 
  Public Function Load_Chest_CT_Compressed() As MedicalViewerSeriesManager 
   Dim fileName As String = "C:\Leadtools_DICOMDIR\" 
   Dim studyInstanceUID As String = "1.3.12.2.1107.5.99.2.5562.4.0.575080331232768" 
   Dim seriesInstanceUID As String = "1.3.12.2.1107.5.99.2.5562.4.0.575080411334689" 
   Return LoadSeries(fileName, studyInstanceUID, seriesInstanceUID, 158) 
  End Function 
 ' this will load the series specified by the seriesInstanceUID and studyInstanceUID from the file specified in fileName 
  Private Function LoadSeries(ByVal fileName As String, ByVal studyInstanceUID As String, ByVal seriesInstanceUID As String, ByVal count As Integer) As MedicalViewerSeriesManager 
   DicomEngine.Startup() 
   Dim ds As DicomDataSet = New DicomDataSet() 
   ds.Load(fileName & "DICOMDIR", DicomDataSetLoadFlags.None) 
   Dim directoryPath As String = fileName 
   ' Here the program will search for the study with the specified studyInstanceUID. 
   _studyElement = FindStudy(ds, studyInstanceUID) 
   ' Here the program will search for the series with the specified seriesInstanceUID. 
   _seriesElement = FindSeries(ds, _studyElement, seriesInstanceUID) 
   ' create a new instance of the MedicalViewerSeriesManager which will be used to sort the images, in order to create the correct 3D object. 
   _seriesManager = New MedicalViewerSeriesManager() 
   ' create an array of MedicalViewerImageData. This class will be used to save the frame information. This information will be used to sort the images. 
   _imageDataList = New List(Of MedicalViewerImageData)() 
   Dim dicomDataSet As DicomDataSet 
   Dim imageIndex As Integer 
   Dim imagePath As String 
   Dim echoNumber As Integer = 0 
   ' Now the program will go through each frame in the series 
   imagePath = GetFirstImageName(ds, _seriesElement, directoryPath, imageElement) 
   imageIndex = 0 
   Do While imageIndex < count 
     Try 
        ' each image in the series will be loaded. 
        dicomDataSet = New DicomDataSet() 
        dicomDataSet.Load(imagePath, DicomDataSetLoadFlags.None) 
        ' The program will load it's information and save it into a new instance of the class MedicalViewerImageData. 
        AddImageToImageArray(dicomDataSet, imageIndex, imagePath, echoNumber) 
        dicomDataSet.Dispose() 
        ' go to the next image. 
        imagePath = GetNextImageName(ds, directoryPath, imageElement) 
       Catch exception As System.Exception 
        System.Diagnostics.Debug.Assert(False, exception.Message) 
        Throw 
       End Try 
      imageIndex += 1 
   Loop 
    ' sort the images, based on its data. 
    _seriesManager.Sort(_imageDataList) 
    DicomEngine.Shutdown() 
    Return _seriesManager 
  End Function

DicomElement _studyElement; 
DicomElement _seriesElement; 
MedicalViewerSeriesManager _seriesManager; 
List<MedicalViewerImageData> _imageDataList; 
double[] doubleArray; 
DicomElement patientElement; 
string referenceUID; 
DicomElement imageElement; 
MedicalViewerSeriesManager output; 
// Find the study using the Study instance UID, and return it's DicomElement if the study is found 
private DicomElement FindStudy(DicomDataSet ds, string studyInstanceUID) 
{ 
  // get the parent element. 
  DicomElement patientElement = ds.GetFirstKey(null, true); 
  DicomElement studyElement = null; 
  DicomElement studyInformationElement = null; 
  string studyID; 
  studyElement = ds.GetChildKey(patientElement); 
  studyElement = ds.GetChildElement(studyElement, true); 
  while (studyElement != null) 
  { 
      studyInformationElement = ds.FindFirstElement(studyElement, 
                                   DicomTag.StudyInstanceUID, 
                                   true); 
      if (studyInformationElement != null) 
      { 
         studyID = ds.GetConvertValue(studyInformationElement); 
         if (studyID == studyInstanceUID) 
            return studyInformationElement; 
      } 
      studyElement = ds.GetNextKey(studyElement, true); 
      studyElement = ds.GetChildElement(studyElement, true); 
  } 
  return null; 
} 
// Find the series using the Series instance UID, and return it's DicomElement if the series is found 
private DicomElement FindSeries(DicomDataSet ds, DicomElement studyElement, string seriesInstanceUID) 
{ 
  DicomElement seriesElement = null; 
  DicomElement seriesInformationElement = null; 
  string seriesID; 
  seriesElement = ds.GetChildKey(studyElement); 
  seriesElement = ds.GetChildElement(seriesElement, true); 
  while (seriesElement != null) 
  { 
      seriesInformationElement = ds.FindFirstElement(seriesElement, 
                                     DicomTag.SeriesInstanceUID, 
                                     true); 
      if (seriesInformationElement != null) 
      { 
         seriesID = ds.GetConvertValue(seriesInformationElement); 
         if (seriesID == seriesInstanceUID) 
            return seriesInformationElement; 
      } 
      seriesElement = ds.GetNextKey(seriesElement, true); 
      seriesElement = ds.GetChildElement(seriesElement, true); 
  } 
  return null; 
} 
// return the first frame file name of the series. 
private string GetFirstImageName(DicomDataSet ds, DicomElement seriesElement, string directoryPath, out DicomElement imageElement) 
{ 
  DicomElement imageIDElement = null; 
  imageElement = ds.GetChildKey(seriesElement); 
  imageElement = ds.GetChildElement(imageElement, true); 
  while (imageElement != null) 
  { 
      imageIDElement = ds.FindFirstElement(imageElement, 
                           DicomTag.ReferencedFileID, 
                           true); 
      if (imageIDElement != null) 
      { 
         return directoryPath + "\\" + ds.GetConvertValue(imageIDElement); 
      } 
  } 
  return ""; 
} 
// return the next frame file name of the series. 
private string GetNextImageName(DicomDataSet ds, string directoryPath, ref DicomElement imageElement) 
{ 
   DicomElement nextImageElement = null; 
   imageElement = ds.GetNextKey(imageElement, true); 
   imageElement = ds.GetChildElement(imageElement, true); 
   while (imageElement != null) 
   { 
      nextImageElement = ds.FindFirstElement(imageElement, 
                         DicomTag.ReferencedFileID, 
                         true); 
      if (imageElement != null) 
      { 
         DicomElement echoElement = ds.FindFirstElement(imageElement, 
                           DicomTag.EchoNumber, 
                           true); 
         return directoryPath + "\\" + ds.GetConvertValue(nextImageElement); 
      } 
  } 
   return ""; 
} 
// This will load the dicom data set information and save it into a new instance of the class MedicalViewerImageData. 
private bool AddImageToImageArray(DicomDataSet ds, int index, string imagePath, out int echoNumber) 
{ 
   echoNumber = -1; 
   MedicalViewerImageData imageData = new MedicalViewerImageData(); 
   patientElement = ds.FindFirstElement(null, 
                        DicomTag.ImagePositionPatient, 
                        true); 
   doubleArray = ds.GetDoubleValue(patientElement, 0, 3); 
   imageData.ImagePosition = Point3D.FromDoubleArray(doubleArray); 
   imageData.Data = imagePath; 
   imageData.EchoNumber = echoNumber; 
   patientElement = ds.FindFirstElement(null, 
                       DicomTag.FrameOfReferenceUID, 
                       true); 
   referenceUID = ds.GetConvertValue(patientElement); 
   imageData.FrameOfReferenceUID = referenceUID; 
   patientElement = ds.FindFirstElement(null, 
                       DicomTag.ImageOrientationPatient, 
                       true); 
   imageData.ImageOrientation = ds.GetConvertValue(patientElement); 
   patientElement = ds.FindFirstElement(null, 
                        DicomTag.PixelSpacing, 
                        true); 
   doubleArray = ds.GetDoubleValue(patientElement, 0, 2); 
   imageData.PixelSpacing = new Point2D((float)doubleArray[0], (float)doubleArray[1]); 
   patientElement = ds.FindFirstElement(null, 
                       DicomTag.InstanceNumber, 
                       true); 
   if (patientElement != null) 
      imageData.InstanceNumber = Convert.ToInt32(ds.GetConvertValue(patientElement)); 
   patientElement = ds.FindFirstElement(null, 
                       DicomTag.InstanceCreationTime, 
                       true); 
   if (patientElement != null) 
      imageData.CaptureTime = Convert.ToDateTime(ds.GetConvertValue(patientElement)); 
   _imageDataList.Add(imageData); 
   return true; 
} 
public MedicalViewerSeriesManager Load_Chest_CT_Compressed() 
{ 
  string fileName = @"C:\Leadtools_DICOMDIR\"; 
  string studyInstanceUID = "1.3.12.2.1107.5.99.2.5562.4.0.575080331232768"; 
  string seriesInstanceUID = "1.3.12.2.1107.5.99.2.5562.4.0.575080411334689"; 
  return LoadSeries(fileName, studyInstanceUID, seriesInstanceUID, 158); 
} 
// this will load the series specified by the seriesInstanceUID and studyInstanceUID from the file specified in fileName 
private MedicalViewerSeriesManager LoadSeries(string fileName, string studyInstanceUID, string seriesInstanceUID, int count) 
{ 
  DicomEngine.Startup(); 
  DicomDataSet ds = new DicomDataSet(); 
  ds.Load(fileName + "DICOMDIR", DicomDataSetLoadFlags.None); 
  string directoryPath = fileName; 
  // Here the program will search for the study with the specified studyInstanceUID. 
  _studyElement = FindStudy(ds, studyInstanceUID); 
  // Here the program will search for the series with the specified seriesInstanceUID. 
  _seriesElement = FindSeries(ds, _studyElement, seriesInstanceUID); 
  // create a new instance of the MedicalViewerSeriesManager which will be used to sort the images, in order to create the correct 3D object. 
  _seriesManager = new MedicalViewerSeriesManager(); 
  // create an array of MedicalViewerImageData. This class will be used to save the frame information. This information will be used to sort the images. 
  _imageDataList = new List<MedicalViewerImageData>(); 
  DicomDataSet dicomDataSet; 
  int imageIndex; 
  string imagePath; 
  int echoNumber = 0; 
  // Now the program will go through each frame in the series 
  imagePath = GetFirstImageName(ds, _seriesElement, directoryPath, out imageElement); 
  for (imageIndex = 0; imageIndex < count; imageIndex++) 
  { 
     try 
     { 
        // each image in the series will be loaded. 
        dicomDataSet = new DicomDataSet(); 
        dicomDataSet.Load(imagePath, DicomDataSetLoadFlags.None); 
        // The program will load it's information and save it into a new instance of the class MedicalViewerImageData. 
        AddImageToImageArray(dicomDataSet, imageIndex, imagePath, out echoNumber); 
        dicomDataSet.Dispose(); 
        // go to the next image. 
        imagePath = GetNextImageName(ds, directoryPath, ref imageElement); 
       } 
       catch (System.Exception exception) 
       { 
         System.Diagnostics.Debug.Assert(false, exception.Message); 
         throw; 
       } 
   } 
   // sort the images, based on its data. 
   _seriesManager.Sort(_imageDataList); 
   DicomEngine.Shutdown(); 
   return _seriesManager;

Now you need to create a method to get the loaded images and create a 3D object out of them using the 3D memory efficiency method:

Private Sub Load3DObjectUsingDICOMDIR(ByVal object3D As Medical3DObject) 
' start up the codes, which allows loading various images. 
Dim _codecs As RasterCodecs = New RasterCodecs() 
' Load the CT dicom dir and return arranged stack of images. 
Dim output As MedicalViewerSeriesManager = Load_Chest_CT_Compressed() 
' Initialize loading the object. by specfiying the number of slices that will construct the 3D object. 
object3D.MemoryEfficientInit(output.Stacks(0).Items.Count) 
' loop through the images and add them one by one to the created 3D object 
Dim image As RasterImage 
Dim depth As Integer = output.Stacks(0).Items.Count 
Dim index As Integer 
index = 0 
Do While index < depth 
   image = _codecs.Load(CStr(output.Stacks(0).Items(index).Data), 0, CodecsLoadByteOrder.BgrOrGrayOrRomm, 1, 1) 
   object3D.MemoryEfficientSetFrame(image, index, output.Stacks(0).Items(index).ImagePosition, True) 
   index += 1 
Loop 
' wrap up the creation process by calling this method. 
object3D.MemoryEfficientEnd(output.Stacks(0).Items(0).ImageOrientationArray, output.Stacks(0).PixelSpacing) 
End Sub 
Private Sub Load2DCell(ByVal cell As MedicalViewerMultiCell) 
' start up the codes, which allows loading various images. 
Dim _codecs As RasterCodecs = New RasterCodecs() 
' Load the CT dicom dir and return arranged stack of images. 
Dim output As MedicalViewerSeriesManager = Load_Chest_CT_Compressed() 
' loop through the images and add them one by one to the final image 
Dim image As RasterImage = Nothing 
Dim depth As Integer = output.Stacks(0).Items.Count 
Dim index As Integer 
index = 0 
Do While index < depth 
   If image Is Nothing Then 
      image = _codecs.Load(CStr(output.Stacks(0).Items(index).Data), 0, CodecsLoadByteOrder.BgrOrGrayOrRomm, 1, 1) 
   Else 
      image.AddPage(_codecs.Load(CStr(output.Stacks(0).Items(index).Data), 0, CodecsLoadByteOrder.BgrOrGrayOrRomm, 1, 1)) 
   End If 
   index += 1 
Loop 
cell.Image = image 
End Sub

void Load3DObjectUsingDICOMDIR(Medical3DObject object3D) 
{ 
   // start up the codes, which allows loading various images. 
   RasterCodecs _codecs = new RasterCodecs(); 
   // Load the CT dicom dir and return arranged stack of images. 
   MedicalViewerSeriesManager output = Load_Chest_CT_Compressed(); 
   // Initialize loading the object. by specfiying the number of slices that will construct the 3D object. 
   object3D.MemoryEfficientInit(output.Stacks[0].Items.Count); 
   // loop through the images and add them one by one to the created 3D object 
   RasterImage image; 
   int depth = output.Stacks[0].Items.Count; 
   int index; 
   for (index = 0; index < depth; index++) 
   { 
      image = _codecs.Load((string)output.Stacks[0].Items[index].Data, 0, CodecsLoadByteOrder.BgrOrGrayOrRomm, 1, 1); 
      object3D.MemoryEfficientSetFrame(image, index, output.Stacks[0].Items[index].ImagePosition, true); 
   } 
   // wrap up the creation process by calling this method. 
   object3D.MemoryEfficientEnd(output.Stacks[0].Items[0].ImageOrientationArray, output.Stacks[0].PixelSpacing); 
} 
void Load2DCell(MedicalViewerMultiCell cell) 
{ 
   // start up the codes, which allows loading various images. 
   RasterCodecs _codecs = new RasterCodecs(); 
   // Load the CT dicom dir and return arranged stack of images. 
   MedicalViewerSeriesManager output = Load_Chest_CT_Compressed(); 
   // loop through the images and add them one by one to the final image 
   RasterImage image = null; 
   int depth = output.Stacks[0].Items.Count; 
   int index; 
   for (index = 0; index < depth; index++) 
   { 
      if (image == null) 
      { 
         image = _codecs.Load((string)output.Stacks[0].Items[index].Data, 0, CodecsLoadByteOrder.BgrOrGrayOrRomm, 1, 1); 
      } 
      else 
         image.AddPage(_codecs.Load((string)output.Stacks[0].Items[index].Data, 0, CodecsLoadByteOrder.BgrOrGrayOrRomm, 1, 1)); 
   } 
   cell.Image = image; 
}

Finally, add the following line at the end of the InitClass method. This will call the above method which will load the DICOMDIR files, arrange them and create a 3D object out of them.
VB
```
Load3DObjectUsingDICOMDIR(object3D) 
```
C#
```
Load3DObjectUsingDICOMDIR(object3D); 
```
Run the application. If you have done everything successfully, you will be able to see a 2X2 layout of the MedicalViewer. The top left portion contains part of a human chest rendered in as a 3D object.

Note: For more information on how to acquire the above unlock keys, please contact LEAD Technologies support.

Note: If you encounter an "Invalid File Format" or "Feature Not Supported" exception, please refer to the topic Invalid File Format/Feature Not Supported.

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