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Page 746​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

>Referenced Patient Setup​

(300C,006A)​

3​

Uniquely identifies Patient Setup to be used for current beam, specified​

Number​

 

 

by Patient Setup Number (300A,0182) within Patient Setup Sequence of​

 

 

 

RT Patient Setup Module.​

>Referenced Reference​

(300C,0042)​

3​

Referenceimagesusedforvalidationofcurrentbeam.OneormoreItems​

Image Sequence​

 

 

are permitted in this Sequence.​

>>Include Table 10-11 “SOP Instance Reference Macro​

 

Attributes”​

 

 

 

>>ReferenceImageNumber​

(300A,00C8)​

1​

UniquelyidentifiesReferenceImagewithinReferencedReferenceImage​

 

 

 

Sequence (300C,0042).​

>>StartCumulativeMeterset​

(300C,0008)​

3​

Cumulative Meterset Weight within current Beam at which image​

Weight​

 

 

acquisition starts.​

>>EndCumulativeMeterset​

(300C,0009)​

3​

Cumulative Meterset Weight within current Beam at which image​

Weight​

 

 

acquisition ends.​

>PlannedVerificationImage​

(300A,00CA)​

3​

Sequence of planned verification images to be acquired during current​

Sequence​

 

 

beam.​

 

 

 

One or more Items are permitted in this Sequence.​

 

 

 

See Section C.8.8.14.2.​

>>StartCumulativeMeterset​

(300C,0008)​

3​

Cumulative Meterset Weight within current Beam at which image​

Weight​

 

 

acquisition will start.​

>>Meterset Exposure​

(3002,0032)​

3​

Metersetdurationoverwhichimageistobeacquired,specifiedinMonitor​

 

 

 

units(MU)orminutesasdefinedbyPrimaryDosimeterUnit(300A,00B3).​

>>EndCumulativeMeterset​

(300C,0009)​

3​

Cumulative Meterset Weight within current Beam at which image​

Weight​

 

 

acquisition will end.​

>>RT Image Plane​

(3002,000C)​

3​

Describes whether or not image plane is normal to beam axis.​

 

 

 

Enumerated Values:​

 

 

 

NORMAL​ image plane normal to beam axis​

 

 

 

NON_NORMAL​image plane non-normal to beam axis​

>>X-Ray Image Receptor​

(3002,000E)​

3​

X-Ray Image Receptor Angle i.e., orientation of IEC X-RAY IMAGE​

Angle​

 

 

RECEPTOR coordinate system with respect to IEC GANTRY coordinate​

 

 

 

system (degrees). See Section C.8.8.14.3.​

>>RT Image Orientation​

(3002,0010)​

3​

The direction cosines of the first row and the first column with respect to​

 

 

 

the IEC X-RAY IMAGE RECEPTOR coordinate system.​

>>RT Image Position​

(3002,0012)​

3​

The x and y coordinates (in mm) of the upper left hand corner of the​

 

 

 

image, in the IEC X-RAY IMAGE RECEPTOR coordinate system. This​

 

 

 

is the center of the first pixel transmitted.​

>>RT Image SID​

(3002,0026)​

3​

Radiation machine source to image plane distance (mm).​

>>Imaging Device-Specific​

(300A,00CC)​

3​

User-specified device-specific parameters that describe how the imager​

Acquisition Parameters​

 

 

will acquire the image.​

>>Referenced Reference​

(300C,0007)​

3​

Uniquely identifies Reference Image to which planned verification image​

Image Number​

 

 

is related, specified by Reference Image Number (300A,00C8) within​

 

 

 

Referenced Reference Image Sequence (300C,0042).​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 747​

Attribute Name​

Tag​

Type​

 

Attribute Description​

 

>Treatment Delivery Type​

(300A,00CE)​

3​

Delivery Type of treatment.​

 

 

 

 

Defined Terms:​

 

 

 

 

 

TREATMENT​

normal patient treatment​

 

 

 

 

OPEN_PORTFILM​portal image acquisition with open field​

 

 

 

 

TRMT_PORTFILM​portal image acquisition with treatment port​

 

 

 

CONTINUATION​ continuation of interrupted treatment​

 

 

 

 

SETUP​

no treatment beam is applied for this RT Beam. To​

 

 

 

 

be used for specifying the gantry, couch, and other​

 

 

 

 

machine positions where X-Ray set-up images or​

 

 

 

 

measurements are to be taken​

 

>Referenced Dose​

(300C,0080)​

3​

Related instances of RT Dose (for grids, isodose curves, and​

Sequence​

 

 

named/unnamed point doses).​

 

 

 

 

One or more Items are permitted in this Sequence.​

 

>>Include Table 10-11 “SOP Instance Reference Macro​

 

 

 

Attributes”​

 

 

 

 

 

>Number of Wedges​

(300A,00D0)​

1​

Number of wedges associated with current Beam.​

 

>Wedge Sequence​

(300A,00D1)​

1C​

Sequence of treatment wedges. Required if Number of Wedges​

 

 

 

(300A,00D0) is non-zero. One or more Items shall be included in this​

 

 

 

Sequence.​

 

 

>>Wedge Number​

(300A,00D2)​

1​

Identification number of the Wedge. The value of Wedge Number​

 

 

 

(300A,00D2) shall be unique within the Beam in which it is created.​

>>Wedge Type​

(300A,00D3)​

2​

Type of wedge (if any) defined for Beam.​

 

 

 

 

Defined Terms:​

 

 

 

 

 

STANDARD​standard (static) wedge​

 

 

 

 

DYNAMIC​ moving beam limiting device (collimator) jaw simulating​

 

 

 

wedge​

 

 

 

 

MOTORIZED​single wedge that can be removed from beam remotely​

>>Wedge ID​

(300A,00D4)​

3​

User-supplied identifier for Wedge.​

 

>>Accessory Code​

(300A,00F9)​

3​

An identifier for the accessory intended to be read by a device such as​

 

 

 

a bar-code reader.​

 

>>Wedge Angle​

(300A,00D5)​

2​

Nominal wedge angle (degrees).​

 

>>Wedge Factor​

(300A,00D6)​

2​

Nominal wedge factor under machine calibration conditions at the beam​

 

 

 

energy specified by the Nominal Beam Energy (300A,0114) of the first​

 

 

 

Control Point of the Control Point Sequence (300A,0111).​

 

>>Wedge Orientation​

(300A,00D8)​

2​

Orientation of wedge, i.e., orientation of IEC WEDGE FILTER coordinate​

 

 

 

system with respect to IEC BEAM LIMITING DEVICE coordinate system​

 

 

 

(degrees).​

 

 

>>Source to Wedge Tray​

(300A,00DA)​

3​

Radiation source to wedge tray attachment edge distance (in mm) for​

Distance​

 

 

current wedge.​

 

 

>>Effective Wedge Angle​

(300A,00DE)​

3​

Effective wedge angle (degrees). See Section C.8.8.14.14.​

 

>Number of Compensators​

(300A,00E0)​

1​

Number of compensators associated with current Beam.​

 

>Total Compensator Tray​

(300A,00E2)​

3​

Compensator Tray transmission factor (between 0 and 1), at the beam​

Factor​

 

 

energy specified by the Nominal Beam Energy (300A,0114) of the first​

 

 

 

Control Point of the Control Point Sequence (300A,0111).​

 

- Standard -​

Page 748​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

>Compensator Sequence​

(300A,00E3)​

1C​

Sequence of treatment compensators.​

 

 

 

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

 

 

 

Required if Number of Compensators (300A,00E0) is non-zero.​

>>CompensatorDescription​

(300A,02EB)​

3​

User defined description for the compensator.​

>>Compensator Number​

(300A,00E4)​

1C​

Identification number of the Compensator. The value of Compensator​

 

 

 

Number (300A,00E4) shall be unique within the Beam in which it is​

 

 

 

created. Required if Number of Compensators (300A,00E0) is non-zero.​

>>Compensator Type​

(300A,00EE)​

3​

Type of compensator (if any).​

 

 

 

Defined Terms:​

 

 

 

STANDARD​physical (static) compensator​

 

 

 

DYNAMIC​movingBeamLimitingDevice(collimator)simulatingphysical​

 

 

 

compensator​

>>Material ID​

(300A,00E1)​

2C​

User-supplied identifier for material used to manufacture Compensator.​

 

 

 

Required if Number of Compensators (300A,00E0) is non-zero.​

>>Compensator ID​

(300A,00E5)​

3​

User-supplied identifier for compensator.​

>>Accessory Code​

(300A,00F9)​

3​

An identifier for the Compensator intended to be read by a device such​

 

 

 

as a bar-code reader.​

>>Compensator Tray ID​

(300A,00EF)​

3​

User-supplied identifier for compensator tray.​

>>Tray Accessory Code​

(300A,0355)​

3​

An identifier for the Tray intended to be read by a device such as a​

 

 

 

bar-code reader.​

>>Source to Compensator​

(300A,00E6)​

2​

Radiation source to compensator tray attachment edge distance (in mm)​

Tray Distance​

 

 

for current compensator.​

>>CompensatorDivergence​

(300A,02E0)​

3​

Indicates presence or absence of geometrical divergence of the​

 

 

 

compensator.​

 

 

 

Enumerated Values:​

 

 

 

PRESENT​thecompensatorisshapedaccordingtothebeamgeometrical​

 

 

 

divergence.​

 

 

 

ABSENT​the compensator is not shaped according to the beam​

 

 

 

geometrical divergence.​

>>Compensator Mounting​

(300A,02E1)​

3​

Indicates on which side of the Compensator Tray the compensator is​

Position​

 

 

mounted.​

 

 

 

Enumerated Values:​

 

 

 

PATIENT_SIDE​the compensator is mounted on the side of the​

 

 

 

Compensator Tray that is towards the patient.​

 

 

 

SOURCE_SIDE​the compensator is mounted on the side of the​

 

 

 

CompensatorTraythatistowardstheradiationsource.​

 

 

 

DOUBLE_SIDED​the compensator has a shaped (i.e., non-flat) surface​

 

 

 

on both sides of the Compensator Tray.​

>>Compensator Rows​

(300A,00E7)​

1​

Number of rows in the compensator. A row is defined to be in the X​

 

 

 

direction of the IEC Beam Limiting Device Coordinate system.​

>>Compensator Columns​

(300A,00E8)​

1​

Number of columns in the compensator. A column is defined to be in the​

 

 

 

Y direction of the IEC Beam Limiting Device Coordinate system.​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 749​

Attribute Name​

Tag​

Type​

Attribute Description​

 

>>Compensator Pixel​

(300A,00E9)​

1​

Physical distance (in mm) between the center of each pixel projected​

Spacing​

 

 

ontomachineisocentricplane.Specifiedbyanumericpair-adjacentrow​

 

 

 

spacing (delimiter) adjacent column spacing. See Section 10.7.1.3 for​

 

 

 

further explanation of the value order.​

 

>>Compensator Position​

(300A,00EA)​

1​

The x and y coordinates of the upper left hand corner (first pixel​

 

 

 

transmitted) of the compensator, projected onto the machine isocentric​

 

 

 

plane in the IEC BEAM LIMITING DEVICE coordinate system (mm).​

>>Compensator​

(300A,00EB)​

1C​

A data stream of the pixel samples that comprise the compensator,​

Transmission Data​

 

 

expressed as broad-beam transmission values (between 0 and 1) along​

 

 

 

a ray line passing through the pixel, at the beam energy specified by the​

 

 

 

NominalBeamEnergy(300A,0114)ofthefirstControlPointoftheControl​

 

 

 

Point Sequence (300A,0111). The order of pixels encoded is left to right,​

 

 

 

top to bottom, i.e., the upper left pixel is encoded first followed by the​

 

 

 

remainder of the first row, followed by the first pixel of the 2nd row, then​

 

 

 

the remainder of the 2nd row and so on) when viewed from the radiation​

 

 

 

source.RequiredifMaterialID(300A,00E1)iszero-length.Maybepresent​

 

 

 

if Material ID (300A,00E1) is non-zero length. See Section C.8.8.14.10​

 

 

 

and Section C.8.8.14.11.​

 

 

 

 

Note​

 

 

 

 

Compensator Transmission Data may not be properly encoded​

 

 

 

ifExplicitVRTransferSyntaxisusedandtheVLofthisAttribute​

 

 

 

exceeds 65534 bytes.​

 

>>Compensator Thickness​

(300A,00EC)​

1C​

A data stream of the pixel samples that comprise the compensator,​

Data​

 

 

expressed as thicknesses (in mm). The order of pixels encoded is left to​

 

 

 

right, top to bottom, i.e., the upper left pixel is encoded first followed by​

 

 

 

the remainder of the first row, followed by the first pixel of the 2nd row,​

 

 

 

then the remainder of the 2nd row and so on) when viewed from the​

 

 

 

radiation source. Required if Material ID (300A,00E1) is non-zero length.​

 

 

 

May be present if Material ID (300A,00E1) is zero length. See​

 

 

 

Section C.8.8.14.9 and Section C.8.8.14.10 and Section C.8.8.14.11,​

 

 

 

“Block and Compensator Precedence for Dosimetric Calculations”.​

 

 

 

Note​

 

 

 

 

Compensator Thickness Data may not be properly encoded if​

 

 

 

Explicit VR Transfer Syntax is used and the VL of this Attribute​

 

 

 

exceeds 65534 bytes.​

 

>>Source to Compensator​

(300A,02E2)​

1C​

A data stream of the pixel samples that comprise the distance from the​

Distance​

 

 

radiationsourcetothecompensatorsurfaceclosesttotheradiationsource​

 

 

 

(in mm). The order of pixels encoded is left to right, top to bottom (upper​

 

 

 

left pixel, followed by the remainder of row 1, followed by the remainder​

 

 

 

of the columns). Required if Material ID (300A,00E1) is non-zero length,​

 

 

 

and Compensator Mounting Position (300A,02E1) is DOUBLE_SIDED.​

 

 

 

MaybepresentifMaterialID(300A,00E1)iszerolengthandCompensator​

 

 

 

Mounting Position (300A,02E1) is DOUBLE_SIDED. See​

 

 

 

 

Section C.8.8.14.9 and Section C.8.8.14.11.​

 

>Number of Boli​

(300A,00ED)​

1​

Number of boli associated with current Beam.​

 

>Referenced Bolus​

(300C,00B0)​

1C​

Sequence of boli associated with Beam. Required if Number of Boli​

Sequence​

 

 

(300A,00ED) is non-zero.​

 

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

- Standard -​

Page 750​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

>>Referenced ROI Number​

(3006,0084)​

1​

Uniquely identifies ROI representing the Bolus specified by ROI Number​

 

 

 

(3006,0022)inStructureSetROISequence(3006,0020)inStructureSet​

 

 

 

Module within RT Structure Set in Referenced Structure Set Sequence​

 

 

 

(300C,0060) in RT General Plan Module.​

>>Bolus ID​

(300A,00DC)​

3​

User-supplied identifier for the Bolus.​

>>Bolus Description​

(300A,00DD)​

3​

User-defined description for the Bolus.​

>>Accessory Code​

(300A,00F9)​

3​

An identifier for the accessory intended to be read by a device such as​

 

 

 

a bar-code reader.​

>Number of Blocks​

(300A,00F0)​

1​

Number of shielding blocks associated with Beam.​

>Total Block Tray Factor​

(300A,00F2)​

3​

Total block tray transmission for all block trays (between 0 and 1) at the​

 

 

 

beam energy specified by the Nominal Beam Energy (300A,0114) of the​

 

 

 

first Control Point of the Control Point Sequence (300A,0111).​

>Block Sequence​

(300A,00F4)​

1C​

Sequence of blocks associated with Beam.​

 

 

 

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

 

 

 

Required if Number of Blocks (300A,00F0) is non-zero.​

>>Block Tray ID​

(300A,00F5)​

3​

User-supplied identifier for block tray.​

>>Tray Accessory Code​

(300A,0355)​

3​

An identifier for the Tray intended to be read by a device such as a​

 

 

 

bar-code reader.​

>>Accessory Code​

(300A,00F9)​

3​

An identifier for the Block intended to be read by a device such as a​

 

 

 

bar-code reader.​

>>Source to Block Tray​

(300A,00F6)​

2​

Radiation Source to attachment edge of block tray assembly (mm).​

Distance​

 

 

 

>>Block Type​

(300A,00F8)​

1​

Type of block.​

 

 

 

Enumerated Values:​

 

 

 

SHIELDING​blocking material is inside contour​

 

 

 

APERTURE​blocking material is outside contour​

>>Block Divergence​

(300A,00FA)​

2​

Indicates presence or otherwise of geometrical divergence.​

 

 

 

Enumerated Values:​

 

 

 

PRESENT​block edges are shaped for beam divergence​

 

 

 

ABSENT​block edges are not shaped for beam divergence​

>>Block Mounting Position​

(300A,00FB)​

3​

Indicates on which side of the Block Tray the block is mounted.​

 

 

 

Enumerated Values:​

 

 

 

PATIENT_SIDE​the block is mounted on the side of the Block Tray that​

 

 

 

is towards the patient.​

 

 

 

SOURCE_SIDE​the block is mounted on the side of the Block Tray that​

 

 

 

is towards the radiation source.​

>>Block Number​

(300A,00FC)​

1​

Identification number of the Block. The value of Block Number​

 

 

 

(300A,00FC) shall be unique within the Beam in which it is created.​

>>Block Name​

(300A,00FE)​

3​

User-defined name for block.​

>>Material ID​

(300A,00E1)​

2​

User-supplied identifier for material used to manufacture Block.​

>>Block Thickness​

(300A,0100)​

2C​

Physical thickness of block (in mm) parallel to radiation beam axis.​

 

 

 

Required if Material ID (300A,00E1) is non-zero length. May be present​

 

 

 

if Material ID (300A,00E1) is zero length. See Section C.8.8.14.4 and​

 

 

 

Section C.8.8.14.11.​

- Standard -​

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