Currently, there is an inconsistency between loading RTDOSE data via drag and drop (IOUtil::Load) and with the org.mitk.gui.qt.dicom plugin.
IOUtil approach loads the data correctly whereas no dose visualization is done.
The dicom plugin approach also adds dose visualization.
In DicomRT module, there is a helper function mitk::ConfigureNodeAsDoseNode(mitk::DataNode* doseNode, const mitk::IsoDoseLevelSet* colorPreset, mitk::DoseValueAbs referenceDose, bool showColorWashGlobal) that is in use for the dicom plugin approach. However, we can't use this in the IOUtil approach currently as we need access to the DataNode object, however, we have only access to BaseData object.