Category Supplementary Resource Organisation Digital Imaging and Communications in Medicine (DICOM) ID Sup215 Type Standard Access Open Status Withdrawn Created Feb-19 This draft resource specifies additional information object definitions (IODs) needed to support the new Second Generation Radiotherapy IODs and operations. It introduces radiotherapy radiation IODs and radiotherapy radiation set IODs. A radiotherapy radiation set IOD defines a radiotherapy treatment fraction as a collection of instances of radiotherapy radiation IODs. Radiotherapy radiation IODs represent different treatment modalities. This draft resource also introduces the representation of the C-arm techniques.This draft resource is based on the real-world model and specifications defined in Supplement 147. References, definitions and other information not in this draft resource can be found in Supplement 147.Main sections:· Scope and field of application· Part 2 addendum· Part 3 addendum· Part 4 addendum· Part 6 addendum· Part 16 addendum