| DICOM PS3.3 2024e - Information Object Definitions |
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When the value of Enhanced RT Beam Limiting Device Definition Flag (3008,00A3) has the value YES, the following applies to the content of Enhanced RT Beam Limiting Device Sequence (3008,00A1) and Enhanced RT Beam Limiting Opening Sequence (3008,00A2):
For the Beam Modifier Definition Coordinate System used the following applies:
The Base Beam Modifier Definition Coordinate System is the [IEC 61217] GANTRY coordinate system.
The RT Device Distance Reference Location is (130359, DCM, "Treatment Machine Isocenter")
The value of the RT Beam Modifier Definition Distance (300A,0688) equals 0 since the plane of the RT Beam Modifier Definition is at the Isocenter.
The value of the Beam Modifier Orientation Angle (300A,0645) is 0 for IEC X direction and 90 for IEC Y direction.
The values of boundaries and openings are therefore the same as if comparable parameters would be expressed in the Ion Beam Limiting Device Sequence (300A,03A4).
The values of the boundaries in the Ion Beam Limiting Device Sequence (300A,03A4) correspond to the Snout Position (300A,030D) of the first Control Point only.
Values of Attributes of the Module RT Tolerance Tables Section C.8.8.11 apply to the Enhanced RT Beam Limiting Device Openings as specified in Section C.8.8.14.17.
| DICOM PS3.3 2024e - Information Object Definitions |
|---|