/// <summary>
/// Create a Worklist Query Dataset from the given DCM file. We assume that the DCM file
/// contains the appropriate MWL Query Dataset. If the scheduled procedure step start date
/// is present in the DCM file, it will be overwritten with the value given by scheduledProcedureStepStartDate.
/// </summary>
/// <param name="mwlQueryDcmFilename">MWL Query Dcm Filename.</param>
/// <param name="userDefinedScheduledProcedureStepStartDate">User Defined Scheduled Procedure Step Start Date.</param>
/// <returns>DvtkData.Dimse.DataSet - Modality Worklist Query Dataset.</returns>
public static DvtkData.Dimse.DataSet CreateWorklistQueryDataset(System.String mwlQueryDcmFilename, System.String userDefinedScheduledProcedureStepStartDate)
{
// Read the DCM file
DataSet dataset = Dvtk.DvtkDataHelper.ReadDataSetFromFile(mwlQueryDcmFilename);
dataset.IodId = "Modality Worklist Information Model - FIND SOP Class";
// Update the scheduled procedure step start date (if present)
if (userDefinedScheduledProcedureStepStartDate != System.String.Empty)
{
DvtkData.Dimse.Attribute scheduledProcedureStepSequence = dataset.GetAttribute(Tag.SCHEDULED_PROCEDURE_STEP_SEQUENCE);
if (scheduledProcedureStepSequence != null)
{
SequenceOfItems sequenceOfItems = (SequenceOfItems)scheduledProcedureStepSequence.DicomValue;
if (sequenceOfItems.Sequence.Count == 1)
{
SequenceItem queryItem = sequenceOfItems.Sequence[0];
// Try to get the Scheduled Procedure Step Start Date
// - update it if there is a value defined in the dataset
DvtkData.Dimse.Attribute scheduledProcedureStepStartDate = queryItem.GetAttribute(Tag.SCHEDULED_PROCEDURE_STEP_START_DATE);
if ((scheduledProcedureStepStartDate != null) &&
(scheduledProcedureStepStartDate.Length != 0))
{
// Remove the existing attribute
queryItem.Remove(scheduledProcedureStepStartDate);
// Modify value to today's date
queryItem.AddAttribute(Tag.SCHEDULED_PROCEDURE_STEP_START_DATE.GroupNumber,
Tag.SCHEDULED_PROCEDURE_STEP_START_DATE.ElementNumber,
DvtkData.Dimse.VR.DA,
userDefinedScheduledProcedureStepStartDate);
}
}
}
}
return(dataset);
}
private static void AddTagsToDataset(TagValueCollection tags, DvtkData.Dimse.DataSet dataset)
{
// iterate over the tags
foreach (DicomTagValue tag in tags)
{
if (tag.ParentSequenceTag != Tag.UNDEFINED)
{
// try to get the sequence tag in the dataset
DvtkData.Dimse.Attribute sequenceAttribute = dataset.GetAttribute(tag.ParentSequenceTag);
if ((sequenceAttribute != null) &&
(sequenceAttribute.ValueRepresentation == DvtkData.Dimse.VR.SQ))
{
SequenceOfItems sequenceOfItems = (SequenceOfItems)sequenceAttribute.DicomValue;
if (sequenceOfItems.Sequence.Count == 1)
{
SequenceItem item = sequenceOfItems.Sequence[0];
if (item != null)
{
VR vr = VR.UN;
// try to get the attribute in the item
DvtkData.Dimse.Attribute attribute = item.GetAttribute(tag.Tag);
if (attribute != null)
{
vr = attribute.ValueRepresentation;
item.Remove(attribute);
}
// add the query value
item.AddAttribute(tag.Tag.GroupNumber,
tag.Tag.ElementNumber,
vr,
tag.Value);
}
}
}
}
else
{
VR vr = VR.UN;
// try to get the attribute in the dataset
DvtkData.Dimse.Attribute attribute = dataset.GetAttribute(tag.Tag);
if (attribute != null)
{
vr = attribute.ValueRepresentation;
dataset.Remove(attribute);
}
// special check for the SPECIFIC CHARACTER SET attribute
if (tag.Tag == Tag.SPECIFIC_CHARACTER_SET)
{
vr = VR.CS;
}
// add the query value
dataset.AddAttribute(tag.Tag.GroupNumber,
tag.Tag.ElementNumber,
vr,
tag.Value);
}
}
}