L_DicomGetModalityLUTData

#include "ltdic.h"

L_LTDIC_API L_UINT16 L_DicomGetModalityLUTData(hDS, pLUTData, uDataSize, uFlags)

HDICOMDS hDS;

a DICOM handle

L_UINT16 *pLUTData;

pointer to the target buffer

L_UINT uDataSize;

size of the target buffer

L_UINT uFlags;

reserved for future use

Retrieves "LUT Data" for a "Modality LUT Sequence".

Parameter

Description

hDS

A DICOM handle.

pLUTData

Pointer to the buffer to be updated with the "LUT Data". You must allocate the buffer before calling this function, and the buffer must be large enough to hold the "LUT Data".

uDataSize

Size of the buffer pointed to by pLUTData.

uFlags

Reserved for future use. Pass 0.

Returns

DICOM_SUCCESS

The function was successful.

>0

An error occurred. Refer to Return Codes.

Comments

This function will retrieve the "LUT Data" (0028,3006) under the "Modality LUT Sequence" (0028,3000).

Before calling this function you must call L_DicomGetModalityLUTAttributes and check the pModalityLUTAttributes->bIsModalityLUTSequence flag to see if a "Modality LUT Sequence" exists in the DICOM dataset or not. If the sequence exists, then you must allocate a buffer with a size greater or equal to pModalityLUTAttributes->LUTDescriptor.uNumberOfEntries and then call this function to retrieve the LUT data.

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.

See Also

Functions:

L_DicomGetModalityLUTAttributes, L_DicomSetModalityLUT, L_DicomDeleteModalityLUT, L_ApplyModalityLUT

Topics:

LUT Encoding Overview

 

LUT Encoding: Modality LUT

Example

This example will retrieve the LUT Data (0028,3006) under the Modality LUT Sequence (0028,3000)

L_INT DicomGetModalityLUTDataExample( 
HDICOMDS hDicomDS, 
L_UINT16* pLUTDataBuffer, 
L_UINT uInputBufferSize) 
{ 
   // Structure that will hold modality LUT attributes 
   DICOMMLUTATTRIBS ModalityLUTAttributes= {0}; 
   L_UINT16 uRet; 
   // Sanity Check 
   if((hDicomDS == NULL) || (pLUTDataBuffer== NULL)) 
      return DICOM_ERROR_NULL_PTR; 
   if(uInputBufferSize == 0) 
      return DICOM_ERROR_PARAMETER; 
   memset(pLUTDataBuffer,0,uInputBufferSize); 
   // Get modality LUT attributes 
   uRet = L_DicomGetModalityLUTAttributes(hDicomDS, 0, &ModalityLUTAttributes, sizeof(DICOMMLUTATTRIBS), 0); 
   if(uRet != DICOM_SUCCESS) 
      return uRet; 
   // If there is no modality LUT sequence 
   // then there is no data ! 
   if(!ModalityLUTAttributes.bIsModalityLUTSequence) 
      return DICOM_ERROR_MODALITY_LUT_MISSING; 
   // The buffer should be big enough to hold the data! 
   if(!(uInputBufferSize >= ModalityLUTAttributes.LUTDescriptor.uNumberOfEntries)) 
      return DICOM_ERROR_PARAMETER; 
   // Retrieve the LUT Data (0028,3006) 
   return L_DicomGetModalityLUTData(hDicomDS, pLUTDataBuffer, uInputBufferSize, 0); 
} 

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