A.18.3 RT Dose IOD Module Table

A.18.3 RT Dose IOD Module Table (Current)
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Table A.18.3-1 specifies the Modules of the RT Dose IOD.

Table A.18.3-1. RT Dose IOD Modules

IE	Module	Reference	Usage
Patient	Patient	C.7.1.1	M
Patient	Clinical Trial Subject	C.7.1.3	U
Study	General Study	C.7.2.1	M
	Patient Study	C.7.2.2	U
	Clinical Trial Study	C.7.2.3	U
Series	RT Series	C.8.8.1	M
Series	Clinical Trial Series	C.7.3.2	U
Frame of Reference	Frame of Reference	C.7.4.1	M
Equipment	General Equipment	C.7.5.1	M
Dose	General Image	C.7.6.1	C - Required if dose data contains grid-based doses.
	Image Plane	C.7.6.2	C - Required if dose data contains grid-based doses.
	Image Pixel	C.7.6.3	C - Required if dose data contains grid-based doses.
	Multi-frame	C.7.6.6	C - Required if dose data contains grid-based doses and pixel data is multi-frame data.
	RT Dose	C.8.8.3	M
	RT DVH	C.8.8.4	U
	SOP Common	C.12.1	M
	Common Instance Reference	C.12.2	U
	Frame Extraction	C.12.3	C - Required if the SOP Instance was created in response to a Frame-Level retrieve request

Within the RT Dose IOD, the RT Dose Module supports 2D and 3D dose grids, and the RT DVH Module supports dose-volume histogram data. They are not mutually exclusive: they may be included in a single Instance of the object. Product Conformance Statements should clearly state which of these mechanisms is supported and under what conditions.
The RT Dose IOD has been defined as a Composite IOD, separate from the RT Plan IOD. This has been done for the following reasons:
- to allow for the multiplicity of possible dose calculations using beam models for the same basic plan,
- to avoid undesirable transmission of large amounts of data with the treatment plan, and
- to accommodate the fact that CT Simulation and other "beam geometry" generating devices that use the RT Plan IOD do not have or require access to this data, either for transmission or storage.
The Audio Module (Retired) was previously included in this IOD but has been retired. See PS3.3-2004.
The Overlay Plane Module, Multi-frame Overlay Module, Modality LUT Module, Structure Set Module, ROI Contour Module and RT Dose ROI Module (Retired) were previously included in this IOD. See PS3.3-2022d.

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