DICOM PS3.3 2021e - Information Object Definitions
C.36.2.2.15 General Accessories Definition Macro

This Macro defines the geometric configuration elements which cannot vary during delivery.

Table C.36.2.2.15-1. General Accessories Definition Macro Attributes

Attribute Name

Tag

Type

Attribute Description

Number of General Accessories

(300A,0672)

1C

Number of General Accessories defined in the General Accessory Definition Sequence (300A,0671).

Required if RT Radiation Physical and Geometric Content Detail Flag (300A,0638) equals FULL. May be present otherwise.

General Accessory Definition Sequence

(300A,0671)

1C

General accessory devices.

Required if the Number of General Accessories (300A,0672) is present and has a non-zero value.

The number of Items included in this Sequence shall equal the value of Number of General Accessories (300A,0672).

>Include Table C.36.2.2.3-1 “RT Accessory Device Identification Macro Attributes”.

BCID 9548 “General Accessory Device Types”.

>Device Index

(3010,0039)

1

Index of the Device in this Sequence.

The value shall start at 1 and increase monotonically by 1.

>Referenced Defined Device Index

(300A,0602)

1C

Device Index value that links the device defined by this Sequence Item to the corresponding device in an RT Radiation Instance. The device identification of the two devices may or may not be the same.

The value is the index of a device in the General Accessory Definition Sequence (300A,0671) within the single SOP Instance referenced by Referenced RT Instance Sequence (300A,0631).

Required if the Instance referenced in Referenced RT Instance Sequence (300A,0631) contains the device that corresponds to the device defined by this Sequence Item.

See Section C.36.2.2.8.1.5.

>Beam Modifier Orientation Angle

(300A,0645)

1

Angle in degrees of the Beam Modifier Coordinate System with respect to the Base Beam Modifier Coordinate System. The angle is a Continuous Rotation Angle, see Section C.36.1.1.5.

See Section C.36.1.1.9.


DICOM PS3.3 2021e - Information Object Definitions