VoiLutCount Property

Visual Basic
C#
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public int VoiLutCount {get;}

'Declaration
 
Public ReadOnly Property VoiLutCount As Integer

'Usage
 
Dim instance As DicomDataSet
Dim value As Integer
 
value = instance.VoiLutCount

public int VoiLutCount {get;}

ObjectiveC Syntax

Java Syntax

 get_VoiLutCount();

public:
property int VoiLutCount {
   int get();
}

Property Value

The number of items under the VOI LUT Sequence.

This property gets the number of items under the VOI LUT Sequence (0028,3010). If this Sequence does not exist in the Data Set, the property specifies 0.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Public Sub TestVoiLut()
      Dim dicomFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")
      'Make sure to initialize the DICOM engine, this needs to be done only once 
      'In the whole application
      DicomEngine.Startup()

      Dim ds As DicomDataSet = New DicomDataSet()
      Using (ds)
         Dim VoiLutSize As Integer = 65536

         'Load DICOM File
         ds.Load(dicomFileName, DicomDataSetLoadFlags.None)
         ds.DeleteVoiLut()

         Dim VoiLutAttributes As DicomVoiLutAttributes = New DicomVoiLutAttributes()
         VoiLutAttributes.FirstStoredPixelValueMapped = 0
         VoiLutAttributes.EntryBits = 16
         VoiLutAttributes.NumberOfEntries = VoiLutSize

         Dim LutData As Integer() = New Integer(VoiLutSize - 1) {}
         Dim i As Integer = 0
         Do While i < VoiLutSize
            LutData(i) = i
            i += 1
         Loop
         ds.SetVoiLut(0, VoiLutAttributes, LutData)

         Dim attributes As DicomVoiLutAttributes = ds.GetVoiLut(0)
         If Not attributes Is Nothing Then
            Debug.Assert(attributes.FirstStoredPixelValueMapped = 0)
            Debug.Assert(attributes.EntryBits = 16)
            Debug.Assert(attributes.NumberOfEntries = VoiLutSize)

            Dim data As Integer() = ds.GetVoiLutData(0)
            ' Do something with the data
         End If
         ds.Save(Path.Combine(LEAD_VARS.ImagesDir, "VOILut.dcm"), DicomDataSetSaveFlags.None)

      End Using

      DicomEngine.Shutdown()
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

public void TestVoiLut()
   {
      string dicomFileName = Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm");
      //Make sure to initialize the DICOM engine, this needs to be done only once 
      //In the whole application
      DicomEngine.Startup();
      using (DicomDataSet ds = new DicomDataSet())
      {
         int VoiLutSize = 65536;

         //Load DICOM File
         ds.Load(dicomFileName, DicomDataSetLoadFlags.None);
         ds.DeleteVoiLut();

         DicomVoiLutAttributes VoiLutAttributes = new DicomVoiLutAttributes();
         VoiLutAttributes.FirstStoredPixelValueMapped = 0;
         VoiLutAttributes.EntryBits = 16;
         VoiLutAttributes.NumberOfEntries = VoiLutSize;

         int[] LutData = new int[VoiLutSize];
         for (int i = 0; i < VoiLutSize; i++)
         {
            LutData[i] = i;
         }
         ds.SetVoiLut(0, VoiLutAttributes, LutData);

         DicomVoiLutAttributes attributes = ds.GetVoiLut(0);
         if (attributes != null)
         {
            Debug.Assert(attributes.FirstStoredPixelValueMapped == 0);
            Debug.Assert(attributes.EntryBits == 16);
            Debug.Assert(attributes.NumberOfEntries == VoiLutSize);

            int[] data = ds.GetVoiLutData(0);
            // Do something with the data
         }
         ds.Save(Path.Combine(LEAD_VARS.ImagesDir, "VOILut.dcm"), DicomDataSetSaveFlags.None);

      }
      DicomEngine.Shutdown();
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

[TestMethod]
public async Task TestVoiLut()
{
   //Make sure to initialize the DICOM engine, this needs to be done only once 
   //In the whole application
   DicomEngine.Startup();
   using (DicomDataSet ds = new DicomDataSet())
   {
      int VoiLutSize = 65536;
      //Load DICOM File
      string filePath = @"Assets\IMAGE3.dcm";
      StorageFile file = await Tools.AppInstallFolder.GetFileAsync(filePath);
      ILeadStream stream = LeadStreamFactory.Create(file);
      bool success = await ds.LoadAsync(stream, DicomDataSetLoadFlags.None);
      Debug.Assert(success); ds.DeleteVoiLut();

      DicomVoiLutAttributes VoiLutAttributes = new DicomVoiLutAttributes();
      VoiLutAttributes.FirstStoredPixelValueMapped = 0;
      VoiLutAttributes.EntryBits = 16;
      VoiLutAttributes.NumberOfEntries = VoiLutSize;

      int[] LutData = new int[VoiLutSize];
      for (int i = 0; i < VoiLutSize; i++)
      {
         LutData[i] = i;
      }
      ds.SetVoiLut(0, VoiLutAttributes, LutData);

      DicomVoiLutAttributes attributes = ds.GetVoiLut(0);
      if (attributes != null)
      {
         Debug.Assert(attributes.FirstStoredPixelValueMapped == 0);
         Debug.Assert(attributes.EntryBits == 16);
         Debug.Assert(attributes.NumberOfEntries == VoiLutSize);

         int[] data = ds.GetVoiLutData(0);
         // Do something with the data
      }
      string dicomFileNameOutput = "VOILut.dcm";
      StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(dicomFileNameOutput);
      ILeadStream streamOutput = LeadStreamFactory.Create(saveFile);
      using (IDisposable disposableOUT = streamOutput as IDisposable)
      {
         await ds.SaveAsync(streamOutput, DicomDataSetSaveFlags.None);
      }
   }
   DicomEngine.Shutdown();
}

public void TestVoiLut(Stream dicomStream, Stream outputStream)
{
   //Make sure to initialize the DICOM engine, this needs to be done only once 
   //In the whole application
   DicomEngine.Startup();
   using (DicomDataSet ds = new DicomDataSet())
   {
      int VoiLutSize = 65536;
      //Load DICOM File
      ds.Load(dicomStream, DicomDataSetLoadFlags.None);
      ds.DeleteVoiLut();

      DicomVoiLutAttributes VoiLutAttributes = new DicomVoiLutAttributes();
      VoiLutAttributes.FirstStoredPixelValueMapped = 0;
      VoiLutAttributes.EntryBits = 16;
      VoiLutAttributes.NumberOfEntries = VoiLutSize;

      int[] LutData = new int[VoiLutSize];
      for (int i = 0; i < VoiLutSize; i++)
      {
         LutData[i] = i;
      }
      ds.SetVoiLut(0, VoiLutAttributes, LutData);

      DicomVoiLutAttributes attributes = ds.GetVoiLut(0);
      if (attributes != null)
      {
         Debug.Assert(attributes.FirstStoredPixelValueMapped == 0);
         Debug.Assert(attributes.EntryBits == 16);
         Debug.Assert(attributes.NumberOfEntries == VoiLutSize);

         int[] data = ds.GetVoiLutData(0);
         // Do something with the data
      }
      ds.Save(outputStream, DicomDataSetSaveFlags.None);

   }
   DicomEngine.Shutdown();
}

Public Sub TestVoiLut(ByVal dicomStream As Stream, ByVal outputStream As Stream)
   'Make sure to initialize the DICOM engine, this needs to be done only once 
   'In the whole application
   DicomEngine.Startup()
   Using ds As DicomDataSet = New DicomDataSet()
      Dim VoiLutSize As Integer = 65536
      'Load DICOM File
      ds.Load(dicomStream, DicomDataSetLoadFlags.None)
      ds.DeleteVoiLut()

      Dim VoiLutAttributes As DicomVoiLutAttributes = New DicomVoiLutAttributes()
      VoiLutAttributes.FirstStoredPixelValueMapped = 0
      VoiLutAttributes.EntryBits = 16
      VoiLutAttributes.NumberOfEntries = VoiLutSize

      Dim LutData As Integer() = New Integer(VoiLutSize - 1){}
      Dim i As Integer = 0
      Do While i < VoiLutSize
         LutData(i) = i
         i += 1
      Loop
      ds.SetVoiLut(0, VoiLutAttributes, LutData)

      Dim attributes As DicomVoiLutAttributes = ds.GetVoiLut(0)
      If Not attributes Is Nothing Then
         Debug.Assert(attributes.FirstStoredPixelValueMapped = 0)
         Debug.Assert(attributes.EntryBits = 16)
         Debug.Assert(attributes.NumberOfEntries = VoiLutSize)

         Dim data As Integer() = ds.GetVoiLutData(0)
         ' Do something with the data
      End If
      ds.Save(outputStream, DicomDataSetSaveFlags.None)

   End Using
   DicomEngine.Shutdown()
End Sub

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DicomDataSet Class
DicomDataSet Members
GetWindowCount Method
GetWindow(Int32) Method
SetWindow(Int32,DicomWindowAttributes) Method
DeleteWindow Method
GetVoiLut Method
SetVoiLut Method
GetVoiLutData Method
DeleteVoiLut Method