Table C.36.2.2.12-1 specifies the Attributes of the Compensators Definition Macro, which define the geometric configuration elements which cannot vary during delivery.
Table C.36.2.2.12-1. Compensators Definition Macro Attributes
|
Number of Compensators defined in the Compensator Definition Sequence (300A,0662). Required if RT Radiation Physical and Geometric Content Detail Flag (300A,0638) equals FULL. May be present otherwise. |
|||
|
Treatment compensator definitions. Required if Number of Compensators (300A,00E0) is present and has a non-zero value. The number of Items included in this Sequence shall equal the value of Number of Compensators (300A,00E0). |
|||
|
>Include Table C.36.2.2.3-1 “RT Accessory Device Identification Macro Attributes”. |
|||
|
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 Compensator Definition Sequence (300A,0662) 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. |
|||
|
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. |
|||
|
The distance in mm between the mounting plane and the base plane of the compensator. The value shall be positive when the base plane is farther away from the reference location (as specified by RT Device Distance Reference Location Code Sequence (300A,0659) ) than the mounting plane. Required if RT Radiation Physical and Geometric Content Detail Flag (300A,0638) equals FULL. May be present otherwise. |
|||
|
Side of the compensator base that the compensator surface shape faces. Enumerated Values: Required if RT Radiation Physical and Geometric Content Detail Flag (300A,0638) equals FULL. May be present otherwise. |
|||
|
Description of the shape of the Compensator and the fabrication parameters. Required if RT Radiation Physical and Geometric Content Detail Flag (300A,0638) equals FULL. May be present otherwise. |
|||
|
Whether or not the compensator is shaped according to the beam geometrical divergence. |
|||
|
User-defined identifier for the material used to manufacture the Compensator. |
|||
|
A data stream of triplets of x, y and thickness in mm representing a map of the coordinates in the Beam Modifier Definition Plane and thicknesses from the compensator base plane. The order of triplets is not significant. Required if Compensator Map Orientation (300A,0663) is SOURCE_SIDE or DOUBLE_SIDED. |
|||
|
A data stream of triplets of x, y and thickness in mm representing a map of the coordinates in the Beam Modifier Definition Plane and thicknesses from the compensator base plane. The order of triplets is not significant. Required if Compensator Map Orientation (300A,0663) is PATIENT_SIDE or DOUBLE_SIDED. |
|||
|
The method of fabrication, such as shape of tools to be used, surface modeling technique. |
|||
|
>>>Include Table 8.8-1 “Code Sequence Macro Attributes”. |
|||
|
The diameter in mm of the milling tool to be used to create the compensator. The diameter is expressed as the actual physical size and not a size projected on the Beam Modifier Definition Plane. |
|||
The thickness values stored in Compensator Proximal Thickness Map (300A,0664) and Compensator Distal Thickness Map (300A,0665) shall be specified parallel to the radiation beam axis if Compensator Divergence (300A,02E0) equals ABSENT, or specified according to the beam geometrical divergence if Compensator Divergence (300A,02E0) equals PRESENT.
The compensator base plane is the side of the compensator which is flat. In case of a double-sided compensator, the base plane is the plane from which the compensator thickness is specified.
The direction of the rows and columns in Compensator Proximal Thickness Map (300A,0664) and Compensator Distal Thickness Map (300A,0665) is defined as follows: The direction of rows goes along the positive X direction and the direction of the columns goes along the negative Y direction of the Beam Modifier Coordinate System.