Материал: part03

Page 1616​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Number of Compensators​

(300A,00E0)​

1C​

NumberofCompensatorsdefinedintheCompensatorDefinitionSequence​

(300A,0662).​

Required if RT Radiation Physical and Geometric Content Detail Flag​

(300A,0638) equals FULL. May be present otherwise.​

Compensator Definition​

(300A,0662)​

1C​

Treatment compensator definitions.​

Sequence​

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​

ofNumber of Compensators (300A,00E0).​

>Include Table C.36.2.2.3-1 “RT Accessory Device​

DCID 9542 “Compensator Device Types”.​

Identification Macro Attributes”.​

>Device Index​

(3010,0039)​

1​

Index of the Device in this Sequence.​

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

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Attribute Name​

Tag​

Type​

Attribute Description​

>Referenced Defined​

(300A,0602)​

1C​

Device Index value that links the device defined by this Sequence Item to​

Device Index​

the corresponding device in an RT Radiation Instance. The description of​

the two devices may or may not be the same.​

ThevalueistheindexofadeviceintheCompensatorDefinitionSequence​

(300A,0662)withinthesingleSOPInstancereferencedbyReferencedRT​

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.​

>Beam Modifier​

(300A,0645)​

1​

Angle in degrees of the Beam Modifier Coordinate System with respect to​

Orientation Angle​

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.​

>CompensatorBasePlane​ (300A,0666)​

1C​

The distance in mm between the mounting plane and the base plane of​

Offset​

the compensator.​

The value shall be positive when the base plane is farther away from the​

referencelocation(asspecifiedbyRTDeviceDistanceReferenceLocation​

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.​

See Section C.36.2.2.12.1.2.​

>Compensator Map​

(300A,0663)​

1C​

Side of the compensator base that the compensator surface shape faces.​

Orientation​

Enumerated Values:​

PATIENT_SIDE​Thecompensatorsurfaceshapeisdirectedtowardsthe​

patient.​

SOURCE_SIDE​Thecompensatorsurfaceshapeisdirectedtowardsthe​

Radiation Source.​

DOUBLE_SIDED​Thecompensatorhastwocompensatorsurfaceshapes​

which are directed towards the patient and source​

respectively.​

Required if RT Radiation Physical and Geometric Content Detail Flag​

(300A,0638) equals FULL. May be present otherwise.​

>Compensator Shape​

(300A,0668)​

1C​

Description of the shape of the Compensator and the fabrication​

Sequence​

parameters.​

Required if RT Radiation Physical and Geometric Content Detail Flag​

(300A,0638) equals FULL. May be present otherwise.​

Only one Item shall be present.​

>>Compensator​

(300A,02E0)​

1​

Whether or not the compensator is shaped according to the beam​

Divergence​

geometrical divergence.​

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Attribute Name​

Tag​

Type​

Attribute Description​

>>Material ID​

(300A,00E1)​

2​

User-defined identifier for the material used to manufacture the​

Compensator.​

>>Compensator Proximal​

(300A,0664)​

1C​

A data stream of triplets of x, y and thickness in mm representing a map​

Thickness Map​

of the coordinates in the Beam Modifier Definition Plane and thicknesses​

from the compensator base plane. The order of triplets is not significant.​

RequiredifCompensatorMapOrientation(300A,0663)isSOURCE_SIDE​

or DOUBLE_SIDED.​

See Section C.36.2.2.12.1.1 and Section C.36.2.2.12.1.3.​

>>Compensator Distal​

(300A,0665)​

1C​

A data stream of triplets of x, y and thickness in mm representing a map​

Thickness 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.​

See Section C.36.2.2.12.1.1 and Section C.36.2.2.12.1.3.​

>>Compensator Shape​

(300A,0667)​

2​

The method of fabrication, such as shape of tools to be used, surface​

Fabrication Code​

modelling technique.​

Sequence​

Zero or more Items shall be included in this Sequence.​

>>>Include Table 8.8-1 “Code Sequence Macro​

No Baseline CID is defined.​

Attributes”.​

>>Radiation Beam​

(300A,0669)​

2​

Thediameterinmmofthemillingtooltobeusedtocreatethecompensator.​

Compensator Milling Tool​

The diameter is expressed as the actual physical size and not a size​

Diameter​

projected on the Beam ModifierDefinition Plane.​

Attribute Name​

Tag​

Type​

Attribute Description​

Number of Blocks​

(300A,00F0)​

1C​

Number of Blocks defined in the Block Definition Sequence (300A,066A).​

Required if RT Radiation Physical and Geometric Content Detail Flag​

(300A,0638) is FULL. May be present otherwise.​

Block Definition​

(300A,066A)​

1C​

Block definitions.​

Sequence​

Required if Number of Blocks (300A,00F0) is present and has a non-zero​

value.​

The number of Items included in this Sequence shall equal the value of​

Number of Blocks (300A,00F0).​

OnlyoneIteminthisSequenceshallhave(130123,DCM,"ApertureBlock")​

as the code value of Device Type Code Sequence (3010,002E).​

DCID 9517 “Radiotherapy Block Device Types”.​

Identification Macro Attributes”.​

The Device Alternate Identifier (3010,001B) Attribute of the RT Accessory​

Device Identification Macro shall not contain a value when the Number of​

Block Slab Items (300A,0440) is non-zero.​

>Device Index​

(3010,0039)​

1​

Index of the Device in this Sequence.​

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

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Attribute Name​

Tag​

Type​

Attribute Description​

>Referenced Defined​

(300A,0602)​

1C​

Device Index value that links the device defined by this Sequence Item to​

Device Index​

the corresponding device in an RT Radiation Instance. The description of​

the two devices may or may not be the same.​

The value is the index of a device in the Block Definition Sequence​

(300A,066A) 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.​

>Beam Modifier​

(300A,0645)​

1​

Angle in degrees of the Beam Modifier Coordinate System with respect to​

Orientation Angle​

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.​

>Material ID​

(300A,00E1)​

2​

User-defined identifier for material used to manufacture the Block.​

>Block Divergence​

(300A,00FA)​

1C​

Whether or not the block is shaped according to the beam geometrical​

divergence.​

Enumerated Values:​

PRESENT​Block edges are shaped for beam divergence.​

ABSENT​Block edges are not shaped for beam divergence.​

Required if RT Radiation Physical and Geometric Content Detail Flag​

(300A,0638) equals FULL. May be present otherwise.​

>Block Orientation​

(300A,066C)​

1C​

Specifies on which side of the block base the block extends.​

Enumerated Values:​

PATIENT_SIDE​The block extends from its base towards the patient.​

SOURCE_SIDE​The block extends from its base towards the Radiation​

Source.​

Required if RT Radiation Physical and Geometric Content Detail Flag​

(300A,0638) equals FULL. May be present otherwise.​

>Radiation Beam Block​

(300A,066D)​

2C​

Physicalthicknessofblockinmmparalleltothecentralradiationbeamaxis.​

Thickness​

Required if Material ID (300A,00E1) has a value. May be present otherwise.​

>Block Edge Data​

(300A,066F)​

2​

Block Edge Data streams.​

Sequence​

ThepolygonsrepresentedbytheBlockEdgeData(300A,066B)datastreams​

in all Items in this Sequence shall be non-overlapping.​

Zero or more Items shall be included in this Sequence.​

>>Block Edge Data​

(300A,066B)​

1​

A data stream of coordinate pairs in mm representing a polygon which​

comprise the block edge.​