GetModalityLutAttributes() Method

Summary

Retrieves the attributes that describe the Modality LUT.

Syntax

C++

Java

public DicomModalityLutAttributes GetModalityLutAttributes()

Public Overloads Function GetModalityLutAttributes() As DicomModalityLutAttributes

public DicomModalityLutAttributes getModalityLutAttributes()

public: 
DicomModalityLutAttributes^ GetModalityLutAttributes();

Return Value

Modality LUT attributes.

Remarks

If the method does not find any of the attributes of the "Modality LUT Module" it will set both IsModalityLutSequence and IsRescaleSlopeIntercept to false. In this case, the rest of the members of the DicomModalityLutAttributes class are undefined. If the method finds the "Rescale Intercept" (0028,1052) and "Rescale Slope" (0028,1053) elements, it will set IsRescaleSlopeIntercept to true and populate RescaleIntercept, RescaleSlope, and RescaleType with the values retrieved from the DICOM Data Set.

If the method finds "Modality LUT Sequence" (0028,3000), it will set IsModalityLutSequence to true and populate FirstStoredPixelValueMapped, NumberOfEntries, EntryBits, LutExplanation, and LutType with the values retrieved from the DICOM Data Set.

It is prohibited by the DICOM standard for both "Rescale Intercept" and "Modality LUT Sequence" to exist in the same DICOM Data Set. However, if this method encounters such a Data Set, it will ignore "Modality LUT Sequence" and assume that only "Rescale Intercept" exists.

Example

This example will extract the modality LUT information from a DICOM dataset.

using Leadtools; 
using Leadtools.Dicom; 
 
 
public void TestGetModalityLutAttributes() 
{ 
   string dicomFileName = Path.Combine(LEAD_VARS.ImagesDir, "DICOM", "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()) 
   { 
      //Load DICOM File 
      ds.Load(dicomFileName, DicomDataSetLoadFlags.None); 
      DicomModalityLutAttributes modalityLutAttributes = ds.GetModalityLutAttributes(); 
      if (modalityLutAttributes != null && modalityLutAttributes.IsModalityLutSequence) 
      { 
         int[] ModalityLutData = ds.GetModalityLutData(); 
      } 
   } 
   DicomEngine.Shutdown(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Dicom 
 
Public Sub TestGetModalityLutAttributes() 
   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) 
      'Load DICOM File 
      ds.Load(dicomFileName, DicomDataSetLoadFlags.None) 
      Dim modalityLutAttributes As DicomModalityLutAttributes = ds.GetModalityLutAttributes() 
      If Not modalityLutAttributes Is Nothing AndAlso modalityLutAttributes.IsModalityLutSequence Then 
         Dim ModalityLutData As Integer() = ds.GetModalityLutData() 
      End If 
   End Using 
 
   DicomEngine.Shutdown() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class