Equipment Frame of Reference UID

(300A,0675)

1

Frame of Reference identifier identifying the Equipment Frame of Reference coordinate system which is the parent for Imaging Source Coordinate System and/or the Image Receptor Coordinate System.

See Section 10.39.1.1, Section C.36.1.1.11 and Section C.36.1.1.12.

Beam Modifier Coordinates Presence Flag

(3002,0105)

1

Whether Beam Modifiers which contain coordinates referring to the Beam Modifier Coordinate System are present in the current SOP Instance.

RT Device Distance Reference Location Code Sequence

(300A,0659)

1C

Point of reference used for measuring the distance to various devices.

Required if Beam Modifier Coordinates Presence Flag (3002,0105) equals YES.

Only a single item shall be included in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

DCID 9261 “Patient Position Acquisition Radiation Source Locations”.

RT Beam Modifier Definition Distance

(300A,0688)

1C

Absolute distance in mm along the z-axis of the Base Beam Modifier Coordinate System from the reference location as specified by RT Device Distance Reference Location Code Sequence (300A,0659) to the Beam Modifier Definition Plane.

The value shall be greater than or equal to zero.

Required if Beam Modifier Coordinates Presence Flag (3002,0105) equals YES.

See Section C.36.1.1.9.

Include Table C.36.2.2.2-1 “RT Patient Support Devices Macro Attributes”

Include Table C.36.2.2.15-1 “General Accessories Definition Macro Attributes”

Include Table C.36.2.2.8-1 “RT Beam Limiting Devices Definition Macro Attributes”

Include Table C.36.2.2.22-1 “Patient Position Acquisition Device Macro Attributes”

DCID 9271 “RT Image Patient Position Acquisition Devices”.

The Referenced Defined Device Index (300A,0602) is absent because the SOP Instance containing this Module does not define the SOP Instance Sequence the Referenced Defined Device Index (300A,0602) refers to.