DICOM PS3.3 2019a - Information Object Definitions

7.14.4 RT Segment Annotation

The RT Segment Annotation annotates segmented regions defined in other SOP Instances with radiotherapy-specific information about the role and RT-specific types of the regions (e.g. clinical target volume, organ at risk, bolus) , and other information such as density definitions. An RT Segment Annotation SOP instance may reference any geometric general-purpose representation entity defined by DICOM.

DICOM PS3.3 2019a - Information Object Definitions