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Sets the attributes that describe the VOI LUT.
#include "ltdic.h"
L_LTDIC_API L_UINT16 L_DicomSetVOILUT(hDS, uVOILUTIndex, pVOILUTAttributes, pLUTData, uDataSize, uFlags)
A DICOM handle.
Index to the VOI LUT to be set. According to the DICOM standard one or more items could exist under one VOI LUT Sequence (0028,3010), use this index to specify which item to update. This index is zero-based.
Pointer to a structure containing the VOI LUT attributes to set.
Pointer to the buffer that holds the "LUT Data" (0028,3006), this pointer cant be NULL.
Size of the buffer pointed to by pLUTData , cant be 0.This value should at least equal pVOILUTAttributes->LUTDescriptor.uNumberOfEntries.
Reserved for future use. Pass 0.
| Value | Meaning |
|---|---|
| DICOM_SUCCESS | The function was successful. |
| >0 | An error occurred. Refer to Return Codes. |
This function will set the attributes of the VOI LUT. Before calling this function, initialize pVOILUTAttributes->uStructSize to be sizeof(DICOMVOILUTATTRIBS) and initialize all the members of the structure.
The size of the input buffer should at least equal the number of entries in the lookup table.
According to the DICOM standard pVOILUTAttributes->LUTDescriptor. uNumberOfEntries should be set to 0 if the number of entries in the lookup table is 2^16, however you should NOT do that when calling this function. This function will handle correctly setting the value inside the dataset.
Win32, x64, Linux.
This example will add a new VOI LUT to the dataset or
replace the existing one(s)
#define SET_SIZE(p) (p)->uStructSize = sizeof(*(p));L_INT DicomSetVOILUTExample(HDICOMDS hDicomDS, L_BOOL bAdd){DICOMVOILUTATTRIBS VOILUTAttribs ={0};L_UINT16 uRet;L_UINT uVOILUTCount=0;L_UINT16 *pVOILUTData = NULL;L_UINT uDataSize = 0;L_UINT uLUTIndex;L_UINT uNewLUTIndex = 0;// Remember to set the size for each structureSET_SIZE(&VOILUTAttribs);SET_SIZE(&VOILUTAttribs.LUTDescriptor);// Get the number of VOI LUT(s) in the fileuRet = L_DicomGetVOILUTCount(hDicomDS,&uVOILUTCount);if(uRet != DICOM_SUCCESS)return uRet;if(uVOILUTCount>0){// Get he attributes of the first VOI LUTuRet = L_DicomGetVOILUT(hDicomDS,0,&VOILUTAttribs,sizeof(DICOMVOILUTATTRIBS),0);if(uRet != DICOM_SUCCESS)return uRet;uDataSize = VOILUTAttribs.LUTDescriptor.uNumberOfEntries;pVOILUTData = (L_UINT16*)malloc(uDataSize* sizeof(L_UINT16));if(!pVOILUTData)return DICOM_ERROR_MEMORY;// Get the LUT datauRet = L_DicomGetVOILUTData(hDicomDS,0,pVOILUTData,uDataSize,0);if(uRet != DICOM_SUCCESS){free(pVOILUTData);return uRet;}// Remap the datafor(uLUTIndex = 0; uLUTIndex <= (uDataSize-1); uLUTIndex++)pVOILUTData[uLUTIndex] = pVOILUTData[uLUTIndex]/2;}else{// Define our own LUTVOILUTAttribs.LUTDescriptor.nFirstStoredPixelValueMapped = 0;VOILUTAttribs.LUTDescriptor.uEntryBits = 16;VOILUTAttribs.LUTDescriptor.uNumberOfEntries = 0x10000;uDataSize = VOILUTAttribs.LUTDescriptor.uNumberOfEntries;pVOILUTData = (L_UINT16*)malloc(uDataSize* sizeof(L_UINT16));if(!pVOILUTData)return DICOM_ERROR_MEMORY;memset(pVOILUTData,0,uDataSize* sizeof(L_UINT16));for(uLUTIndex = 0; uLUTIndex<= (uDataSize-1); uLUTIndex++)pVOILUTData[uLUTIndex] = (L_UINT16)uLUTIndex;}uNewLUTIndex = uVOILUTCount;if(!bAdd){// Delete existing LUTuRet = L_DicomDeleteVOILUT(hDicomDS,0);if(uRet != DICOM_SUCCESS){free(pVOILUTData);return uRet;}uNewLUTIndex = 0 ;}// Set the new LUTuRet = L_DicomSetVOILUT(hDicomDS,uNewLUTIndex,&VOILUTAttribs,pVOILUTData,uDataSize,0);if(pVOILUTData)free(pVOILUTData);return uRet;}