Returns a pointer to the root of the specified item.
#include "Ltdic.h"
L_LTDIC_API pDICOMIOD L_DicomGetRootIOD(pIOD)
Pointer to a DICOMIOD structure that contains an item in the IOD Structure.
| Value | Meaning |
|---|---|
| !NULL | A pointer to a DICOMIOD structure that contains the item in the IOD Structure that is the root of the item specified in pIOD. |
| NULL | The IOD Structure is empty or pIOD is NULL. |
The root is the Level 0 ancestor of pIOD. If pIOD 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.

| 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 IOD Structure:
Win32, x64, Linux.
This example displays the root’s name of an item.
L_INT DicomGetRootIODExample(L_VOID){pDICOMIOD pRoot;pDICOMIOD pElement;pElement = L_DicomFindIOD(NULL, TAG_PATIENT_NAME, IOD_TYPE_ELEMENT, FALSE);if (pElement != NULL){pRoot = L_DicomGetRootIOD(pElement);MessageBox(NULL, pRoot->pszName, TEXT("Notice"), MB_OK);}return DICOM_SUCCESS;}
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