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LDicomDS::GetElementOffset

Summary

Returns the offset of the DICOM element pElement in the DICOM file.

Syntax

#include "Ltdic.h"

L_DICOM_OFFSET LDicomDS::GetElementOffset(pElement)

Parameters

pDICOMELEMENT pElement

Pointer to a DICOMELEMENT structure within the Data Set.

Returns

Value	Meaning
0	The offset of the element is unknown.
>0	The offset of the element in the DICOM file.

Comments

You must load a DICOM file using the flag DS_LOAD_STORE_OFFSETS to use this function. Otherwise, LDicomDS::GetElementOffset will always return 0.

This function is used to return the offset (or physical location) in a DICOM file of any DICOM element.

Required DLLs and Libraries

LTDIC
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

Platforms

Win32, x64

Example

This example loads a DICOM file, and finds the physical offset of the TAG_PATIENT_ID in the file.

L_INT LDicomDS_GetElementOffsetExample()  
{ 
   L_INT nRet = -1; 
 
   LDicomDS *ds = new LDicomDS(); 
   if (ds == NULL) 
      return nRet; 
 
   L_TCHAR *pszFile = MAKE_IMAGE_PATH(TEXT("image2.dcm")); 
   nRet = ds->LoadDS(pszFile, DS_LOAD_STORE_OFFSETS); 
   if(nRet != DICOM_SUCCESS) 
      return nRet; 
 
   pDICOMELEMENT pElement = ds->FindFirstElement(NULL, TAG_PATIENT_ID, TRUE); 
   if (pElement == NULL) 
      return -1; 
 
   // uOffset will contain the file offset of the TAG_PATIENT_ID element 
   L_UINT64 uOffset = ds->GetElementOffset(pElement); 
   CString csMsg; 
   csMsg.Format(TEXT("The offset of the TAG_PATIENT_ID in file '%s' is: 0x%x"), pszFile, uOffset); 
   OutputDebugString(csMsg); 
 
   // Clean up 
   delete ds; 
 
   return nRet; 
}