[vtkusers] about the right scalar range of DICOM files

[kidwei]

Dear all,    I have render a volume with a serial of DICOM files, But the scalar range of my dicom file might be 0 to 40, while in some example code I have seen the scalar range is 0 to 4000.  when I use vtkPiecewiseFunction to set the opacity, when the value of AddPoint up to 40, all the materials were shown. How this happened?
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