Imaging Aperture Specification Type

(3002,0115)

3

Type of specification of field aperture for imaging.

Imaging Source to Beam Modifier Definition Plane Distance

(3002,012D)

1C

Distance in mm from the Radiation Source to the origin of the Base Beam Modifier System.

Required ifImaging Aperture Specification Type (3002,0115) does not have a value of OPEN.

Referenced Radiation RT Control Point Index

(300A,073B)

1C

Index of the RT Control Point of the RT Radiation SOP Instance referenced in the Referenced Baseline Parameters RT Radiation Instance Sequence (3002,011E) which provides the basis for the aperture definition of the imaging source.

Required if Imaging Aperture Specification Type (3002,0115) has a value of BEAM or RELATIVE_TO_BEAM.

Imaging Aperture Sequence

(3002,0114)

1C

Parameters describing the aperture of the imaging source.

If Imaging Aperture Specification Type (3002,0115) has a value of CUSTOM, the provided parameter values fully specify the aperture.

If Imaging Aperture Specification Type (3002,0115) has a value of RELATIVE_TO_BEAM, the provided parameter values represent delta values with respect to the values in the referenced RT Control Point in the RT Radiation SOP Instance referenced in the Referenced Baseline Parameters RT Radiation Instance Sequence (3002,011E).

Required if Imaging Aperture Specification Type (3002,0115) has a value of CUSTOM or RELATIVE_TO_BEAM.

Only a single Item shall be included in this Sequence.

>Include Table C.36.2.2.21-1 “RT Beam Limiting Device Opening Sequence Macro Attributes”