ImGearRasterPage rasterPage = (ImGearRasterPage)igPage;
ImGearDICOMDisplaySettings dicomDisplaySettings = rasterPage.DICOMDisplaySettings as ImGearDICOMDisplaySettings;
if (dicomDisplaySettings != null && dicomDisplaySettings.VOI == null)
{
dicomDisplaySettings.VOI = new ImGearVOITransform();
dicomDisplaySettings.VOI.Window =
ImGearVOIWindow.CreateFromChannelSpec(rasterPage.DIB.ChannelDepths[0], rasterPage.DIB.Signed);
}