Get the "Image Position (Patient)" attribute (0020,0032) from a DICOM volume. DICOM calls this the upper left hand corner of the image, but more precisely it's the center of the first voxel, in millimeters (mm). For VolumeViz the upper left hand corner of the image is literally the corner of the voxel, one-half voxel different from Image Position. Note the SoVRDicomData getPosition() method does not return the value of the Image Position attribute. It returns a value computed from Image Position.

public static bool DicomGetImagePosition(
	SoVolumeData volume,
	out SbVec3f imagePos
)

Public Shared Function DicomGetImagePosition ( 
	volume As SoVolumeData,
	<OutAttribute> ByRef imagePos As SbVec3f
) As Boolean

public:
static bool DicomGetImagePosition(
	SoVolumeData^ volume, 
	[OutAttribute] SbVec3f% imagePos
)

static member DicomGetImagePosition : 
        volume : SoVolumeData * 
        imagePos : SbVec3f byref -> bool