L_DicomSetModalityLUT

#include "ltdic.h"

L_LTDIC_API L_UINT16 L_DicomSetModalityLUT(hDS, pModalityLUTAttributes, pLUTData, uDataSize, uFlags)

HDICOMDS hDS;	/* a DICOM handle */
pDICOMMLUTATTRIBS pModalityLUTAttributes;	/* pointer to a Modality LUT attributes structure */
L_UINT16 *pLUTData;	/* pointer to the input buffer */
L_UINT uDataSize;	/* size of the input buffer */
L_UINT uFlags;	/* reserved for future use */

Sets the attributes that describe the Modality LUT.

Parameter	Description
hDS	A DICOM handle.
pModalityLUTAttributes	Pointer to a structure containing the Modality LUT attributes to set.
pLUTData	Pointer to the buffer that holds the "LUT Data". Pass NULL if you are not trying to set the "LUT Data" (0028,3006) under the "Modality LUT Sequence" (0028,3000).
uDataSize	Size of the buffer pointed to by pLUTData. Pass 0 if pLUTData is set to NULL.
uFlags	Reserved for future use. Pass 0.

Returns

0	The function was successful.
>0	An error occurred. Refer to Return Codes.

Comments

This function will set the attributes of the "Modality LUT Module". Before calling this function, initialize pModalityLUTAttributes->uStructSize to be sizeof(DICOMMLUTATTRIBS) and initialize all the attributes which you are changing.

If you are trying to set the "Rescale Intercept" (0028,1052) and "Rescale Slope" (0028,1053), set pModalityLUTAttributes->bIsRescaleSlopeIntercept to TRUE and populate pModalityLUTAttributes->RescaleIntercept, pModalityLUTAttributes->RescaleSlope with the new values. You can also populate pModalityLUTAttributes->szRescaleType if you want to set "Rescale Type" (0028,1054).

If you are trying to set the elements under "Modality LUT Sequence", set pModalityLUTAttributes->bIsModalityLUTSequence to TRUE and populate.

pModalityLUTAttributes->LUTDescriptor and pModalityLUTAttributes->szModalityLUTType .In this case pLUTData should point to the "LUT Data" (0028,3006) buffer.

This function will return an error if both pModalityLUTAttributes->bIsRescaleSlopeIntercept and pModalityLUTAttributes->bIsModalityLUTSequence are set to TRUE. It will also return an error if pModalityLUTAttributes->bIsModalityLUTSequence is set to TRUE and you pass NULL for pLUTData or 0 for uDataSize.

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

See Also

Functions:	L_DicomGetModalityLUTAttributes, L_DicomGetModalityLUTData, L_DicomDeleteModalityLUT
Topics:	LUT Encoding Overview
	LUT Encoding: Modality LUT

Example

This example will set Rescale Intercept (0028,1052) element to -128.0 and Rescale Slope (0028,1053) element to 1.0

L_INT DicomSetModalityLUTExample(HDICOMDS hDicomDS)
{
   L_UINT16 nRet;

   // Structure that will hold the new modality LUT attributes
   DICOMMLUTATTRIBS  ModalityLUTAttributes = {0};

   //Remember to set the structure size
   ModalityLUTAttributes.uStructSize= sizeof(DICOMMLUTATTRIBS);

   //No Modality LUT Sequence (0028,3000)
   ModalityLUTAttributes.bIsModalityLUTSequence    = FALSE;

   //Yes there is a rescale slope and intercept
   ModalityLUTAttributes.bIsRescaleSlopeIntercept  = TRUE;
   ModalityLUTAttributes.fRescaleIntercept         = -128.0;
   ModalityLUTAttributes.fRescaleSlope             = 1.0;
   lstrcpy(ModalityLUTAttributes.szRescaleType,TEXT("UNSPECIFIED"));

   // Delete the existing modality LUT,
   // although we don't have to !
   nRet = L_DicomDeleteModalityLUT(hDicomDS,0);
   if (nRet != DICOM_SUCCESS)
      return nRet;

   //Set rescale slope and intercept
   return L_DicomSetModalityLUT(hDicomDS, &ModalityLUTAttributes, NULL, 0, 0);
}