Window and Level issue in VTK9

Hi,

I am configuring the Window value to 750.0 and the Level value to 455.0 on a DICOM image using the API calls SetColorLevel and SetColorWindow from VTK.

When the Window value is set to 750.0 and the Level value to 455.0, the resulting image appears as depicted below.

In contrast, when the Window value remains at 750.0 but the Level value is adjusted to 1500.0, the image displays as shown here.

In VTK version 5.10, the bone value range for window-level is set to 750, 455; however, in VTK version 9, the bone is represented with a range of 750, 1500.

Is there any change in VTK regarding these values, or am I possibly making an error?