L_DicomAnnCount

#include "ltdic.h"

L_UINT16 EXT_FUNCTION L_DicomAnnCount(hDS, pFileIndices, pnPrivateCreatorTag)

Gets information about the annotations stored in a DICOM data set. This function is available in the Medical Toolkits.

Returns

Comments

LEAD Annotation files can be saved as private data in a DICOM data set (LEAD native format or binary encoded format). There can be up to 256 private data tags for LEAD annotation files. Specify one of the 256 possible files by setting the nIndex parameter to be a value from 0 to 255.

Before calling this function, you must declare an array of 256 integers (L_INT). Then, pass the address of the array for the pFileIndices parameter. This function will update the array to indicate which of the possible 256 annotation files exist.

For example, suppose that a Dicom data set contains three LEAD annotation files at indices 0,1, and 4.

Executing the following

HDICOMDS hDS;
L_INT FileIndices[256];
hDS = L_DicomCreateDS(NULL);
L_DicomLoadDS(hDS, "d:\\work\\images\\a.dic", 0); 
L_DicomAnnCount(hDS, FileIndices, NULL);
L_DicomFreeDS(hDS);

will set the FileIndices as follows:

FileIndices[0] = 1
FileIndices[1] = 1
FileIndices[2] = 0
FileIndices[3] = 0
FileIndices[4] = 1
FileIndices[5..255] = 0

You can obtain the private creator tag used to allocate tags for the LEAD annotation files by declaring a variable of type L_UINT32 and passing the address for the pnPrivateCreatorTag argument. Pass NULL for this argument if you do not wish to retrieve this information.

Please note that both the DICOM capabilities and the DOCUMENT capabilities must be unlocked in order to work with DICOM annotations. For more information on unlocking these capabilities, refer to L_UnlockSupport.

Required DLLs and Libraries

See Also

Example

//This example 
// 1. Opens a dataset with annotations.
// 2. Finds the location of one of the annotation files.
// 3. Loads the annotations.
// 4. Changes the foreground color of the annotations to blue.
// 5. Saves the annotations to position 250 through 255 in the array.
// 6. Deletes the annotation file from position 253.

void  DicomAnnotationExample()
{             
   L_UINT16    nRet;
   HDICOMDS    hDS;
   L_INT       FileIndices[256];
   L_UINT32    nPrivateCreatorTag;
   int         i;
   HANNOBJECT  hAnnContainer;
   char        szMsg[800];
   char        szTmp[100];
   int         nIndexAnn = -1;

   L_UnlockSupport(L_SUPPORT_DOCUMENT, L_KEY_DOCUMENT);
   L_UnlockSupport(L_SUPPORT_DICOM, L_KEY_DICOM);
   
   // Open the dataset with annotations
   hDS = L_DicomCreateDS(NULL);
   nRet = L_DicomLoadDS(hDS, "d:\\work\\images\\DicomAnn.dic", 0);
   if (nRet != DICOM_SUCCESS) return;
   
   // Find the location of one of the annotation files
   nRet = L_DicomAnnCount(hDS, FileIndices, &nPrivateCreatorTag);
   if (nRet != DICOM_SUCCESS) return;
   
   wsprintf(szMsg, "Private Creator Tag: %x\n\nFiles:\n", nPrivateCreatorTag);
   for (i=0; i<255; i++)
   {
      if (FileIndices[i])
      {
         nIndexAnn = i;
         wsprintf(szTmp, "\t%d\n", i);
         strcat(szMsg, szTmp);
      }
   }
   MessageBox(NULL, szMsg, "", MB_OK);
   
   // Loads the annotations
   L_DicomAnnLoad( hDS, &hAnnContainer, nIndexAnn, NULL);
   
   // Change the foreground color of the annotations to blue
    L_AnnSetForeColor(hAnnContainer, RGB(0,0,0xFF), ANNFLAG_RECURSE);
   
   // Save the annotations to index to slots 250 through 255
   for (i=250; i<=255; i++)
      nRet = L_DicomAnnSave( hDS,hAnnContainer,ANNFMT_NATIVE,FALSE,NULL,i,NULL);
   
   // Delete the annotation files from slot 253
   L_DicomAnnDelete(hDS, 253, -1);

   // Display file info
   nRet = L_DicomAnnCount(hDS, FileIndices, &nPrivateCreatorTag);
   if (nRet != DICOM_SUCCESS) return;
   
   wsprintf(szMsg, "Private Creator Tag: %x\n\nFiles:\n", nPrivateCreatorTag);
   for (i=0; i<255; i++)
   {
      if (FileIndices[i])
      {
         wsprintf(szTmp, "\t%d\n", i);
         strcat(szMsg, szTmp);
      }
   }
   MessageBox(NULL, szMsg, "", MB_OK);

   // Save the data set
   L_DicomSaveDS( hDS, "d:\\erase\\dicom.dic", 0);
   L_DicomFreeDS(hDS);
}