L_DicomGetRootElement

#include "Ltdic.h"

L_LTDIC_API pDICOMELEMENT L_DicomGetRootElement(hDS, pElement)

Returns a pointer to the root of the specified item.

Parameters

HDICOMDS hDS

A DICOM handle.

pDICOMELEMENT pElement

Pointer to a DICOMELEMENT structure that contains an item in the Data Set.

Returns

Value Meaning
!NULL A pointer to a DICOMELEMENT structure that contains the item in the Data Set that is the root of the item specified in pElement.
NULL The Data Set is empty or pElement is NULL.

Comments

The root is the Level 0 ancestor of pElement. If pElement points to an item on Level 0, a pointer to that same item will be returned. Please note that the numbering of the items in this illustration is arbitrary and does not imply order.

image\GetRoot.gif
If the passed pointer points to The function returns a pointer to
Item 1 Item 2
Item 3 Item 2
Item 4 Item4
Item 5 Item 6

The following functions will also help you navigate the Data Set:

Required DLLs and Libraries

Platforms

Win32, x64, Linux.

See Also

Functions

Topics

Example

This example displays the root’s name of an element 

L_INT DicomGetRootElementExample(L_VOID) 
{ 
   HDICOMDS       hDS; 
   pDICOMELEMENT  pRoot; 
   pDICOMELEMENT  pElement; 
   pDICOMTAG      pTag; 
   L_TCHAR        szUnknown[]=TEXT("Unknown"); 
   L_TCHAR        *p; 
 
   hDS = L_DicomCreateDS(NULL); 
 
   L_DicomInitDS(hDS, CLASS_XA_BIPLANE_IMAGE_STORAGE_RETIRED, 0);  
 
   pElement = L_DicomFindFirstElement(hDS, NULL, TAG_RADIATION_SETTING, FALSE); 
   if (pElement != NULL) 
   { 
      pRoot = L_DicomGetRootElement(hDS, pElement); 
      pTag = L_DicomFindTag(pRoot->nTag); 
      if (pTag != NULL) 
      { 
         p = pTag->pszName; 
      } 
      else 
      { 
         p = szUnknown; 
      } 
 
      MessageBox(NULL, p, TEXT("Notice"), MB_OK); 
   } 
 
   L_DicomFreeDS(hDS); 
   return DICOM_SUCCESS; 
}

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