A.64 RT Beams Delivery Instruction IOD
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## A.64 RT Beams Delivery Instruction IOD

### A.64.1 RT Beams Delivery Instruction IOD Description

The RT Beams Delivery Instruction IOD contains all the parameters needed to deliver a radiation therapy treatment fraction that are not already described in the referenced RT Plan IOD.

### A.64.2 RT Beams Delivery Instruction IOD Entity-Relationship Model

The E-R Model in Figure A.64-1 depicts those components of the DICOM Information Model that directly reference the RT Beams Delivery Instruction IOD. The Frame of Reference IE, and the IEs at the level of the Image IE in Section A.1.2 other than the Instruction IE are not components of the RT Beams Delivery Instruction IOD.

Figure A.64-1. DICOM RT Beams Delivery Instruction IOD Information Model

### A.64.3 RT Beams Delivery Instruction IOD Module Table

Table A.64.3-1. RT Beams Delivery Instruction IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
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 | General Series | C.7.3.1 | M
Clinical Trial Series | C.7.3.2 | U
Equipment | General Equipment | C.7.5.1 | M
Plan | RT Beams Delivery Instruction | C.8.8.29 | M
Common Instance Reference | C.12.2 | C - Required if not conveyed by a Unified Procedure Step. May be present otherwise.
SOP Common | C.12.1 | M

### A.64.4 RT Beams Delivery Instruction IOD Content Constraints

#### A.64.4.1 Modality

The value of modality (0008,0060) shall be PLAN.

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