L_DicomGetWindow

#include "ltdic.h"

L_UINT16 EXT_FUNCTION L_DicomGetWindow(hDS, uWindowIndex, pWindowAttributes, uStructSize, uFlags)

HDICOMDS hDS;	/* a DICOM handle */
L_UINT uWindowIndex;	/* the window index*/
pDICOMWINDOWATTRIBS pWindowAttributes;	/* pointer to a window attributes structure */
L_UINTuStructSize;	/* the size of the DICOMWINDOWATTRIBS structure */
L_UINT uFlags;	/* reserved for future use */

Retrieves the attributes that describe window center and window width.

Parameter	Description
hDS	A DICOM handle.
uWindowIndex	Index to the window center , window width value to be retrieved. According to the DICOM standard if multiple values are present for the window center and window width, both attributes shall have the same number of values and shall be considered as pairs. This index is zero-based.
pWindowAttributes	Pointer to a structure to be updated with the window-related attributes.
uStructSize	Size of the DICOMWINDOWATTRIBS structure. Pass sizeof(DICOMWINDOWATTRIBS).
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 retrieve the attributes that describe window center and window width and store their values in the structure pointed to by pWindowAttributes.

pWindowAttributes->uStructSize will be set to the value of the parameter uStructSize.

"Window Center" (0028,1050) and "Window Width" (0028,1051) specify a linear conversion from stored pixel values (after any modality LUT or rescale slope and intercept specified in the IOD have been applied) to values to be displayed. Please see "VOI LUT Module Attributes" in the DICOM standard for more details.

This function will fail and return DICOM_ERROR_PARAMETER if the window count (number of values under the window center element) equals 0 or if uWindowIndex is greater or equal to the window count.

uWindowIndex is zero-based, if you pass 0 for example this function will populate pWindowAttributes->fWindowCenter with the first value under the "Window Center" (0028,1050) element, pWindowAttributes->fWindowWidth with the first value under the "Window Width" (0028,1051) element and pWindowAttributes->pszWindowCWExplanation with "Window Center & Width Explanation" (0028,1055) element if it exists.

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

Functions:	L_DicomGetWindowCount, L_DicomGetVOILUTCount, L_DicomSetWindow, L_DicomDeleteWindow, L_DicomGetVOILUT, L_DicomSetVOILUT, L_ApplyLinearModalityLUT, L_DicomDeleteVOILUT, L_ApplyLinearVOILUT
Topics:	LUT Encoding Overview
	LUT Encoding: VOI LUT