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Howto: Add private data elements to a DICOM dataset

The following example shows how to add private data elements to a DICOM dataset (if not present yet):

 

#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmdata/dctk.h"
 
#define PRV_PrivateCreator  DcmTag(0x0029, 0x0010, EVR_LO)
#define PRV_PrivateElement1 DcmTag(0x0029, 0x1000, EVR_LO)
#define PRV_PrivateElement2 DcmTag(0x0029, 0x1010, EVR_US)
#define PRV_PrivateElement3 DcmTag(0x0029, 0x1020, EVR_OB)
 
void addPrivateElements(DcmItem &item)
{
  if (!item.tagExists(PRV_PrivateCreator))
  {
    item.putAndInsertString(PRV_PrivateCreator, "Your Company Name");
    item.putAndInsertString(PRV_PrivateElement1, "Some Text");
    item.putAndInsertUint16(PRV_PrivateElement2, 12345);
    item.putAndInsertUint8Array(PRV_PrivateElement3, NULL /*data*/, 0 /*length*/);
  }
}

 Please note that for private tags the value representation (VR) has to be specified explicitly to be complete.

It is also possible to register private tags to the data dictionary during runtime:

 

#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmdata/dctk.h"
 
#define PRIVATE_CREATOR_NAME "Your Company Name"
 
#define PRIVATE_ELEMENT1_TAG 0x0029, 0x1000
#define PRIVATE_ELEMENT2_TAG 0x0029, 0x1010
#define PRIVATE_ELEMENT3_TAG 0x0029, 0x1020
 
void registerPrivateTags()
{
  DcmDataDictionary &dict = dcmDataDict.wrlock();
  dict.addEntry(new DcmDictEntry(PRIVATE_ELEMENT1_TAG, EVR_LO, "PrivateText",    1, 1, "private", OFTrue, PRIVATE_CREATOR_NAME));
  dict.addEntry(new DcmDictEntry(PRIVATE_ELEMENT2_TAG, EVR_US, "PrivateInteger", 1, 1, "private", OFTrue, PRIVATE_CREATOR_NAME));
  dict.addEntry(new DcmDictEntry(PRIVATE_ELEMENT3_TAG, EVR_OB, "PrivateBlob",    1, 1, "private", OFTrue, PRIVATE_CREATOR_NAME));
  dcmDataDict.unlock();
}

 This can be useful for reading datasets with implicit VR (otherwise the VR would be unknown) and e.g. for the textual output of the print() method.

However, this does not mean that you can omit the VR from the putAndInsertXXX() calls. This will change with the next snapshot/release (see commit), so the following will then be possible:

 

#include "dcmtk/config/osconfig.h"
#include "dcmtk/dcmdata/dctk.h"
 
#define PRIVATE_CREATOR_NAME "Your Company Name"
 
#define PRIVATE_CREATOR_TAG  0x0029, 0x0010
#define PRIVATE_ELEMENT1_TAG 0x0029, 0x1000
#define PRIVATE_ELEMENT2_TAG 0x0029, 0x1010
#define PRIVATE_ELEMENT3_TAG 0x0029, 0x1020
 
#define PRV_PrivateCreator   DcmTag(PRIVATE_CREATOR_TAG)
#define PRV_PrivateElement1  DcmTag(PRIVATE_ELEMENT1_TAG, PRIVATE_CREATOR_NAME)
#define PRV_PrivateElement2  DcmTag(PRIVATE_ELEMENT2_TAG, PRIVATE_CREATOR_NAME)
#define PRV_PrivateElement3  DcmTag(PRIVATE_ELEMENT3_TAG, PRIVATE_CREATOR_NAME)
 
void registerPrivateTags()
{
  DcmDataDictionary &dict = dcmDataDict.wrlock();
  dict.addEntry(new DcmDictEntry(PRIVATE_ELEMENT1_TAG, EVR_LO, "PrivateText",    1, 1, "private", OFTrue, PRIVATE_CREATOR_NAME));
  dict.addEntry(new DcmDictEntry(PRIVATE_ELEMENT2_TAG, EVR_US, "PrivateInteger", 1, 1, "private", OFTrue, PRIVATE_CREATOR_NAME));
  dict.addEntry(new DcmDictEntry(PRIVATE_ELEMENT3_TAG, EVR_OB, "PrivateBlob",    1, 1, "private", OFTrue, PRIVATE_CREATOR_NAME));
  dcmDataDict.unlock();
}
 
void addPrivateElements(DcmItem &item)
{
  if (!item.tagExists(PRV_PrivateCreator))
  {
    item.putAndInsertString(PRV_PrivateCreator, PRIVATE_CREATOR_NAME);
    item.putAndInsertString(PRV_PrivateElement1, "Some Text");
    item.putAndInsertUint16(PRV_PrivateElement2, 12345);
    item.putAndInsertUint8Array(PRV_PrivateElement3, NULL /*data*/, 0 /*length*/);
  }
}
 
int main()
{
  DcmFileFormat fileformat;
  fileformat.loadFile("test_in.dcm");
  registerPrivateTags();
  addPrivateElements(*fileformat.getDataset());
  fileformat.saveFile("test_out.dcm", EXS_LittleEndianExplicit);
  fileformat.print(COUT);
  return 0;
}

 

转载：http://support.dcmtk.org/wiki/dcmtk/howto/addprivatedata 

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