WaveformGroupCount Property

using Leadtools.Dicom.Constants;
using Leadtools;
using Leadtools.Dicom;

      
public async Task InsertECGCWaveformRunner()
{
   DicomEngine.Startup();
   using (DicomDataSet ds = new DicomDataSet())
   {
      string filePath = @"Assets\IMAGE1.dcm";
      StorageFile file = await Tools.AppInstallFolder.GetFileAsync(filePath);
      ILeadStream stream = LeadStreamFactory.Create(file);
      bool success = await ds.LoadAsync(stream, DicomDataSetLoadFlags.None);
      Debug.Assert(success);
      short[] samples = { 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 };
      InsertECGCWaveform(ds, samples, 10);
   }
   DicomEngine.Shutdown();
}

public void InsertECGCWaveform(DicomDataSet inputDS, short[] samples, int count)
{

   // Our new waveform group
   DicomWaveformGroup ECGWaveformGroup = new DicomWaveformGroup();

   // Reset the waveform group, we don't 
   // really need to call this! 
   ECGWaveformGroup.Reset();

   // Set the number of samples per channel. You can call 
   // DicomWaveformGroup.GetNumberOfSamplesPerChannel to get 
   // the number of samples
   ECGWaveformGroup.SetNumberOfSamplesPerChannel(count);

   // Set the sampling frequency. You can call 
   // DicomWaveformGroup.GetSamplingFrequency to 
   // get the sampling frequency
   ECGWaveformGroup.SetSamplingFrequency(240.00);

   // Set sample interpretation
   ECGWaveformGroup.SetSampleInterpretation(DicomWaveformSampleInterpretationType.Signed16BitLinear);

   // Just in case! 
   Debug.Assert(ECGWaveformGroup.GetSampleInterpretation() == DicomWaveformSampleInterpretationType.Signed16BitLinear);

   // No Multiplex Group Time Offset
   // You can call DicomWaveformGroup.GetMultiplexGroupTimeOffset 
   // to get the time offset
   ECGWaveformGroup.SetMultiplexGroupTimeOffset(false, 0.0);

   // No Trigger Time Offset
   // You can call DicomWaveformGroup.GetTriggerTimeOffset 
   // to get the trigger time offset
   ECGWaveformGroup.SetTriggerTimeOffset(false, 0.0);

   // No Trigger Sample Position
   // You can call DicomWaveformGroup.GetTriggerSamplePosition
   // to get the trigger sample position
   ECGWaveformGroup.SetTriggerSamplePosition(false, 0);

   // Waveform originality is original   
   ECGWaveformGroup.SetWaveformOriginality(DicomWaveformOriginalityType.Original);

   // Just in case! 
   Debug.Assert(ECGWaveformGroup.GetWaveformOriginality() == DicomWaveformOriginalityType.Original);

   // Set the multiplex group label
   ECGWaveformGroup.SetMultiplexGroupLabel("SCPECG Waveform");
   Debug.Assert(ECGWaveformGroup.GetMultiplexGroupLabel() == "SCPECG Waveform");

   // Set the Waveform padding value
   // You can call DicomWaveformGroup.GetWaveformPaddingValue
   // to get the waveform padding value
   ECGWaveformGroup.SetWaveformPaddingValue(true, 32768);

   InsertECGCChannel(ECGWaveformGroup, samples, count);

   // Delete any waveform groups that already exist in the dataset
   for (int index = 0; index < inputDS.WaveformGroupCount; index++)
   {
      inputDS.DeleteWaveformGroup(index);
   }

   // Insert the new waveform group into the dataset
   inputDS.AddWaveformGroup(ECGWaveformGroup, 0);
}

// Add an ECG channel to the group
void InsertECGCChannel(DicomWaveformGroup ECGWaveformGroup, short[] samples, int count)
{

   // Add a channel to the group
   DicomWaveformChannel ECGChannel = ECGWaveformGroup.AddChannel(1);
   if (ECGChannel == null)
   {
      return;
   }

   // If we want to update a channel, we can first call 
   // DicomWaveformGroup.DeleteChannel and then call 
   // DicomWaveformGroup.AddChannel with the same 
   // index we passed to DeleteChannel


   // Make sure that the channel really got added 
   // This is for the purposes of this sample only, because 
   // the check we did in the previous statement is enough
   if ((ECGWaveformGroup.ChannelCount != 1) ||
         (ECGWaveformGroup.GetChannel(0) == null))
   {
      return;
   }

   // We can call DicomWaveformChannel.GetWaveformGroup to access the waveform
   // group that the channel belongs to

   if (ECGChannel.Index != 0)
   {
      return;
   }

   /*
      Set the channel samples
      The data we are setting in here is 16 bit data.
      We would call SetChannelSamples8 if the data were 8 bit.
      We can also call SetChannelSamples32, which will set the data
      as either 8-bit or 16-bit depending on the sample interpretation
   */

   if (ECGChannel.SetChannelSamples16(samples, count) != count)
   {
      return;
   }

   if ((ECGChannel.GetChannelSamples() == null) || (ECGChannel.GetChannelSamplesCount() == 0))
      return;

   // Set the channel source and sensitivity
   SetChannelSourceAndSensitivity(ECGChannel);

   // Set the channel status
   ECGChannel.SetChannelStatus(DicomChannelStatusType.OK);
   if (ECGChannel.GetChannelStatus() != DicomChannelStatusType.OK)
   {
      return;
   }

   // Set the channel time skew. You can call 
   // LDicomWaveformChannel::GetChannelTimeSkew to get the time skew
   // You can also call DicomWaveformChannel.SetChannelSampleSkew
   // And DicomWaveformChannel.GetChannelSampleSkew to set and get 
   // the channel samples skew
   ECGChannel.SetChannelTimeSkew(0.000000);

   // Set the waveform channel number
   ECGChannel.SetWaveformChannelNumber(true, 0);
   if (ECGChannel.GetWaveformChannelNumber() != 0)
      return;

   // Set the channel label
   ECGChannel.SetChannelLabel("First Channel");

   if (ECGChannel.GetChannelLabel() != "First Channel")
      return;

   // No channel offset
   // You can also call DicomWaveformChannel.GetChannelOffset
   // To get the channel offset

   ECGChannel.SetChannelOffset(false, 0.0);

   // Set filter low frequency
   // You can also call DicomWaveformChannel.GetFilterLowFrequency
   // To get the filter low frequency

   ECGChannel.SetFilterLowFrequency(true, 0.050);

   // Set filter high frequency
   // You can also call DicomWaveformChannel.GetFilterHighFrequency
   // To get the filter high frequency

   ECGChannel.SetFilterHighFrequency(true, 100.00);

   // Set the channel minimum value
   ECGChannel.SetChannelMinimumValue(true, -386);

   // Set the channel maximum value
   ECGChannel.SetChannelMaximumValue(true, 1264);


   if (ECGChannel.GetChannelMinimumValue() != -386)
      return;

   if (ECGChannel.GetChannelMaximumValue() != 1264)
      return;

   /*
      You can also call the following functions to set and get the notch 
      filter frequency and bandwidth
      DicomWaveformChannel.SetNotchFilterFrequency
      DicomWaveformChannel.GetNotchFilterFrequency
      DicomWaveformChannel.SetNotchFilterBandwidth
      DicomWaveformChannel.GetNotchFilterBandwidth
   */

   // Last, but not least, set the channel annotations! 
   SetChannelAnnotations(ECGChannel);
}

//Set the channel source and sensitivity
void SetChannelSourceAndSensitivity(DicomWaveformChannel channel)
{

   // Let's use the DICOM context group tables! 

   ///////////////////////Channel Source/////////////////////////
   // Load the ECG Leads table 

   DicomContextGroupTable.Instance.Load(DicomContextIdentifierType.CID3001);
   DicomContextGroup ECGLeadsGroup = DicomContextGroupTable.Instance.Find(DicomContextIdentifierType.CID3001);
   if (ECGLeadsGroup != null)
   {
      DicomContextIdentifierType type = ECGLeadsGroup.ContextIdentifier;

      DicomCodedConcept codedConcept = DicomContextGroupTable.Instance.FindCodedConcept(ECGLeadsGroup, "SCPECG", "5.6.3-9-1");
      if (codedConcept != null)
      {
         DicomCodeSequenceItem codeSequenceItem = new DicomCodeSequenceItem();
         codeSequenceItem.CodeValue = codedConcept.CodeValue;
         codeSequenceItem.CodingSchemeDesignator = codedConcept.CodingSchemeDesignator;
         codeSequenceItem.CodingSchemeVersion = codedConcept.CodingSchemeVersion;
         codeSequenceItem.CodeMeaning = codedConcept.CodeMeaning;

         // Set the channel source
         channel.SetChannelSource(codeSequenceItem);
         // You can call DicomWaveformChannel.GetChannelSource to get the channel source
      }
   }

   ///////////////////////Channel Sensitivity////////////////////////

   DicomContextGroupTable.Instance.Load(DicomContextIdentifierType.CID3082);
   // Cardiology Units of Measurement
   DicomContextGroup cardiologyUnitsGroup = DicomContextGroupTable.Instance.Find(DicomContextIdentifierType.CID3082);
   if (cardiologyUnitsGroup != null)
   {
      DicomCodedConcept codedConcept = DicomContextGroupTable.Instance.FindCodedConcept(cardiologyUnitsGroup, "UCUM", "mV");
      if (codedConcept != null)
      {
         DicomCodeSequenceItem sourceSequenceItem = new DicomCodeSequenceItem();

         sourceSequenceItem.CodeValue = codedConcept.CodeValue;
         sourceSequenceItem.CodingSchemeDesignator = codedConcept.CodingSchemeDesignator;
         sourceSequenceItem.CodingSchemeVersion = codedConcept.CodingSchemeVersion;
         sourceSequenceItem.CodeMeaning = codedConcept.CodeMeaning;

         // Set the channel sensitivity
         channel.SetChannelSensitivity(true, 0.001220, sourceSequenceItem, 1.0, 0.0);

         // You can call DicomWaveformChannel.GetChannelSensitivity to get the channel sensitivity
      }
   }
}

// Add annotations for the channel
void SetChannelAnnotations(DicomWaveformChannel channel)
{

   // Delete any existing channel annotations
   for (int index = 0; index < channel.GetAnnotationCount(); index++)
   {
      if (channel.GetAnnotation(index) != null)
      {
         channel.DeleteAnnotation(index);
      }
   }

   DicomWaveformAnnotation waveformAnnotation = new DicomWaveformAnnotation();
   DicomCodeSequenceItem codedName = new DicomCodeSequenceItem();

   codedName.CodeValue = "8867-4";
   codedName.CodeMeaning = "Heart rate";
   codedName.CodingSchemeDesignator = "LN";
   codedName.CodingSchemeVersion = "19971101";

   waveformAnnotation.CodedName = codedName;
   //Over here we can access other properties such as 
   // waveformAnnotation.CodedValue and waveformAnnotation.UnformattedTextValue 

   DicomCodeSequenceItem measurementUnits = new DicomCodeSequenceItem();

   measurementUnits.CodeValue = "{H.B.}/min";
   measurementUnits.CodeMeaning = "Heart beat per minute";
   measurementUnits.CodingSchemeDesignator = "UCUM";
   measurementUnits.CodingSchemeVersion = "1.4";

   waveformAnnotation.MeasurementUnits = measurementUnits;

   waveformAnnotation.SetNumericValue(new double[] { 69.00 }, 1);

   channel.AddAnnotation(waveformAnnotation);
}