In This Topic ▼

L_DicomGetRootElement

Summary

Returns a pointer to the root of the specified item.

Syntax

#include "Ltdic.h"

L_LTDIC_API pDICOMELEMENT L_DicomGetRootElement(hDS, pElement)

Parameters

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

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, Linux.

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; 
}