Is it possible to export ROI bounding box annotations to DICOM RT (I know it is not the perfect export type, but I need it to be DICOM RT)? When I export it, and import it back it doesn’t show what I expect (contours).
Annotation objects cannot be exported to DICOM RT structure sets, only segmentations. So from the study you want to export, only the CT is actually considered. I’m not aware of an easy way to convert ROI node to segmentation node. What I can suggest is that you define the ROI using Segment Editor’s Scissors effect. If you replace the MarkupsROI node with that segmentation node in your sucbject hierarchy and do the export the same way then the ox should be exported to RTSS.