The following workflow should be possible. One reason is that a user who accidentally saves manual segmentation work as nrrd , though needs DICOM SEG, it should be possible to fix.
- Load image data in DICOM format
- Perform manual segmentation
- Save segmentation as nrrd
- Restart MITK Workbench
- Load DICOM image from step 1, load nrrd file from step 3
- Save as valid DICOM SEG