read dicom file tags in c#

Can you tell me how to read all the dicom tag and its 开发者_开发百科VR in C#?

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In Evil Dicom it is really easy:

        //All the work is done with this constructor
        DicomFile df = new DicomFile("fileToRead.dcm");
        foreach (DicomObject d in df.DicomObjects)
        {
            Console.WriteLine(string.Format("I have a tag id of {0}, a VR of {1}", d.Tag.Id, d.VR));          
        }

        //To access the data in a native format use .Data property
        string name = df.PATIENT_NAME.Data;

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This is, of course, totally dependent upon what DICOM library you're using.

Using ClearCanvas you'd have something like this:

public foo(DicomFile dfile)
{
   DicomAttributeCollection dac;
   dac = dfile.DataSet;

   DicomUid uid;
   bool success;
   success = dac[DicomTags.SopInstanceUid].TryGetUid(0, out uid);

   if (success)
   {
      // The attribute was present in the collection.  The variable uid
      // contains the SopInstanceUid extracted from the DICOM file
   }
}

Other attributes with different VRs would be extracted using the appropriate field of DicomTags and with an appropriate getter function for the VR. For example, if you wanted to extract EchoTime (an attribute with a value representation of DS) as a double, you'd use TryGetFloat64 instead of TryGetUid. The first integer parameter to TryGetFloat64 (and other similar functions) indicates the particular value that you want to obtain. For an attribute with value multiplicity 1, this parameter would always be 0. For an attribute with VM > 1, you'd extract the nth value by setting the parameter to n-1.

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If you are using GDCM + C# binding:

http://gdcm.sourceforge.net/html/SimplePrint_8cs-example.html

public class SimplePrint
{
  public static void RecurseDataSet(File f, DataSet ds, string indent)
    {
    CSharpDataSet cds = new CSharpDataSet(ds);
    while(!cds.IsAtEnd())
      {
      DataElement de = cds.GetCurrent();
      // Compute VR from the toplevel file, and the currently processed dataset:
      VR vr = DataSetHelper.ComputeVR(f, ds, de.GetTag() );

      if( vr.Compatible( new VR(VR.VRType.SQ) ) )
        {
        uint uvl = (uint)de.GetVL(); // Test cast is ok
        System.Console.WriteLine( indent + de.GetTag().toString() + ":" + uvl ); // why not ?
        //SequenceOfItems sq = de.GetSequenceOfItems();
        // GetValueAsSQ handle more cases than GetSequenceOfItems
        SmartPtrSQ sq = de.GetValueAsSQ();
        uint n = sq.GetNumberOfItems();
        for( uint i = 1; i <= n; i++) // item starts at 1, not 0
          {
          Item item = sq.GetItem( i );
          DataSet nested = item.GetNestedDataSet();
          RecurseDataSet( f, nested, indent + "  " );
          }
        }
      else
        {
        System.Console.WriteLine( indent + de.toString() );
        }
      cds.Next();
      }
    }

  public static int Main(string[] args)
    {
    string filename = args[0];
    Reader reader = new Reader();
    reader.SetFileName( filename );
    bool ret = reader.Read();
    if( !ret )
      {
      return 1;
      }
    File f = reader.GetFile();
    DataSet ds = f.GetDataSet();

    RecurseDataSet( f, ds, "" );

    return 0;
    }
}

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You have various .NET open-source libraries for reading DICOM files, but among others:

• DICOM#
• mdcm

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I implement it using LeadTools

 private DicomDataSet _objLTDicomDataSet = null;
private void OpenDataset(string file, bool loadDefaultImage)
        {
            _objLTDicomDataSet =new DicomDataSet();
            _objLTDicomDataSet.Load(file, DicomDataSetLoadFlags.None);
            DicomElement element, _ele = null;
             element = _objLTDicomDataSet.FindFirstElement(null, DicomTag.PatientName, true);
            string tagName = _objLTDicomDataSet.GetStringValue(element, 0);
        }

also leadtools supports various methods for Get various tags you can use that methods and read the dicom file Methods as below

DicomDataSet.GetRootElement

DicomDataSet.GetParentElement

DicomDataSet.GetChildElement

DicomDataSet.GetFirstElement

DicomDataSet.GetLastElement

DicomDataSet.GetPreviousElement

DicomDataSet.GetNextElement

for more info LeadTools Site