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DicomContextGroupTable Class

Summary
The LDicomContextGroup class provides functionality for working with a table of Context Groups (the Context Group Table). The Context Groups defined by the DICOM Content Mapping Resource (DCMR), which is specified by PS 3.16 of the DICOM Standard, are maintained by LEADTOOLS in an internal table. The class offers properties and methods that allow you to do the following: Load the desired Context Groups from the internal table into the Context Group Table

Insert Context Groups and Coded Concepts to the Context Group Table

Maneuver through the Context Group Table

Search the Context Group Table for a specific Context Group or Coded Concept

Delete Context Groups and Coded Concepts from the Context Group Table

Modify the Code Meanings of Coded Concepts

Restore Context Groups

For more information, refer to Working with Context Groups.

Syntax
C#
Objective-C
C++/CLI
public class DicomContextGroupTable 
@interface LTDicomContextGroupTable : NSObject 
public ref class DicomContextGroupTable  
Example
C#
using Leadtools; 
using Leadtools.Dicom; 
 
 
       
public void InsertContextGroup() 
{ 
 
   DicomDateTimeValue version = new DicomDateTimeValue(); 
 
   version.Year = 2004; 
   version.Month = 3; 
   version.Day = 22; 
   version.Hours = 0; 
   version.Minutes = 0; 
   version.Seconds = 0; 
   version.Fractions = 0; 
   version.Offset = 0; 
 
   // Insert a (testing) Context Group 
   DicomContextGroup group = DicomContextGroupTable.Instance.Insert("CID XXXX", "New Context Group", true, version, DicomContextGroupTableInsertFlags.None); 
   if (group == null) 
   { 
      return; 
   } 
 
   // Fill the Context Group with some (testing) Coded Concepts 
   DicomContextGroupTable.Instance.InsertCodedConcept(group, "CSD1", null, "CV1", "CM1", DicomDateTimeValue.Empty, null, DicomContextGroupTableInsertFlags.None); 
   DicomContextGroupTable.Instance.InsertCodedConcept(group, "CSD2", null, "CV2", "CM2", DicomDateTimeValue.Empty, null, DicomContextGroupTableInsertFlags.None); 
   DicomContextGroupTable.Instance.InsertCodedConcept(group, "CSD3", null, "CV3", "CM3", DicomDateTimeValue.Empty, null, DicomContextGroupTableInsertFlags.None); 
 
   EnumCodedConcepts(group); 
 
   // Delete the Context Group 
   DicomContextGroupTable.Instance.Delete(group); 
} 
 
void DisplayCodedConcept(DicomCodedConcept concept) 
{ 
   DicomContextGroup group = DicomContextGroupTable.Instance.GetContextGroup(concept); 
   StringBuilder title = new StringBuilder(); 
   StringBuilder msg = new StringBuilder(); 
 
   title.AppendFormat("Coded Concept ({0} '{1}')", group.ContextIdentifier, group.ContextIdentifierValue); 
 
   msg.AppendFormat("Coding Scheme Designator: {0}{1}Coding Scheme Version: {2}{1}Code Value:{3}{1}Code Meaning: {4}", 
         concept.CodingSchemeDesignator, 
         Environment.NewLine, 
         concept.CodingSchemeVersion != null ? concept.CodingSchemeVersion : "N/A", 
         concept.CodeValue, 
         concept.CodeMeaning); 
 
   Console.WriteLine($"{title.ToString()}: {msg.ToString()}"); 
} 
void EnumCodedConcepts(DicomContextGroup group) 
{ 
   // Enumerate the Coded Concepts in the Context Group (3 possible ways)  
 
   // One possible way to enumerate the Coded Concepts 
   DicomCodedConcept concept = DicomContextGroupTable.Instance.GetFirstCodedConcept(group); 
   while (concept != null) 
   { 
      DisplayCodedConcept(concept); 
      concept = DicomContextGroupTable.Instance.GetNextCodedConcept(concept); 
   } 
 
   // This code is commented out on purpose, it shows two other ways of  
   // enumerating the Coded Concepts 
 
   /* 
   // Another way to enumerate the Coded Concepts 
   for (int i = 0; i < DicomContextGroupTable.Instance.GetCodedConceptCount(group); i++) 
   { 
      concept = DicomContextGroupTable.Instance.FindCodedConceptByIndex(group, i); 
      DisplayCodedConcept(concept); 
   } 
 
   // A third way to enumerate the Coded Concepts 
   concept = DicomContextGroupTable.Instance.GetLastCodedConcept(group); 
   while (concept != null)  
   { 
      DisplayCodedConcept(concept); 
      concept = DicomContextGroupTable.Instance.GetPreviousCodedConcept(concept); 
   } 
   */ 
} 
 
void EnumContextGroups() 
{ 
   DicomContextGroupTable.Instance.Reset(); 
   // Load all the Context Groups 
   DicomContextGroupTable.Instance.Load(null); 
 
   // Enumerate them (3 possible ways)  
 
   // One possible way to enumerate the Context Groups 
   DicomContextGroup group = DicomContextGroupTable.Instance.GetFirst(); 
   while (group != null) 
   { 
      StringBuilder msg = new StringBuilder(); 
      msg.AppendFormat("{0}{2}{1}{2}{2}Enumerate Coded Concepts?", 
         group.ContextIdentifier, 
         group.Name, 
         Environment.NewLine); 
 
      Console.WriteLine($"Context Group: {msg}"); 
      EnumCodedConcepts(group); 
 
      group = DicomContextGroupTable.Instance.GetNext(group); 
   } 
 
   // This code is commented out on purpose, it shows two other ways of  
   // enumerating Context Groups 
 
   /* 
   // Another way to enumerate the Context Groups 
   for (int i = 0; i < DicomContextGroupTable.Instance.Count; i++) 
   { 
      group = DicomContextGroupTable.Instance.FindIndex(i);  
 
      msg.AppendFormat("{0}{2}{1}{2}{2}Enumerate Coded Concepts?", 
         group.ContextIdentifier, 
         group.Name, 
         Environment.NewLine);  
 
      DialogResult result  = MessageBox.Show(msg.ToString(), "Context Group", MessageBoxButtons.YesNoCancel); 
      if(result == DialogResult.Yes) 
      { 
         EnumCodedConcepts(group);  
      } 
      else if (result == DialogResult.Cancel)  
      { 
         break;  
      } 
   } 
 
   // A third way to enumerate the Context Groups 
   group = DicomContextGroupTable.Instance.GetLast(); 
   while (group != null)  
   { 
 
      msg.AppendFormat("{0}{2}{1}{2}{2}Enumerate Coded Concepts?", 
         group.ContextIdentifier, 
         group.Name, 
         Environment.NewLine); 
 
      DialogResult result = MessageBox.Show(msg.ToString(), "Context Group", MessageBoxButtons.YesNoCancel); 
      if (result == DialogResult.Yes) 
      { 
         EnumCodedConcepts(group); 
      } 
      else if (result == DialogResult.Cancel) 
      { 
         break; 
      } 
      group = group = DicomContextGroupTable.Instance.GetPrev(group);  
   } 
           
   */ 
} 
 
void ModifyContextGroup() 
{ 
   DicomContextGroupTable.Instance.Reset(); 
   DicomContextGroupTable.Instance.Load(null); 
 
   DicomContextGroup group = null; 
   DicomCodedConcept concept = null; 
 
   // Look for a Context Group 
   group = DicomContextGroupTable.Instance.Find(DicomContextIdentifierType.CID6019); 
   if (group == null) 
   { 
      return; 
   } 
 
   // Look for a Coded Concept in the Context Group 
   concept = DicomContextGroupTable.Instance.FindCodedConcept(group, "SRT", "F-01781"); 
   if (concept == null) 
   { 
      return; 
   } 
 
   // Set the Code Meaning of the Coded Concept (French translation)  
   if (DicomContextGroupTable.Instance.SetCodeMeaning(concept, "Situé à 1 heure") == false) 
   { 
      return; 
   } 
 
   DisplayCodedConcept(concept); 
 
   // Delete the Coded Concept 
   DicomContextGroupTable.Instance.DeleteCodedConcept(concept); 
 
   // Add a (testing) Coded Concept to the Context Group 
   concept = DicomContextGroupTable.Instance.InsertCodedConcept(group, 
                                                                  "CSD", 
                                                                  null, 
                                                                  "CV", 
                                                                  "CM", 
                                                                  DicomDateTimeValue.Empty, 
                                                                  null, 
                                                                  DicomContextGroupTableInsertFlags.None); 
 
   if (concept == null) 
   { 
      return; 
   } 
   DisplayCodedConcept(concept); 
 
   // Restore the Context Group (discard all the changes made to the Group)  
   DicomContextGroupTable.Instance.Default(group); 
   EnumCodedConcepts(group); 
   // Delete the Context Group 
   DicomContextGroupTable.Instance.Delete(group); 
} 
Requirements

Target Platforms

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