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DICOM PS3.3 2020a - Information Object Definitions​

Page 811​

Attribute Name​

Tag​

Type​

 

Description​

 

>>>Accessory Code​

(300A,00F9)​

3​

Machine-readable identifier for this accessory.​

 

>Snout Sequence​

(300A,030C)​

3​

Sequence of Snouts associated with Beam.​

 

 

 

 

Only a single Item is permitted in this Sequence.​

 

>>Snout ID​

(300A,030F)​

1​

User or machine supplied identifier for Snout.​

 

>>Accessory Code​

(300A,00F9)​

3​

Anaccessoryidentifiertobereadbyadevicesuchasabarcodereader.​

>Applicator Sequence​

(300A,0107)​

3​

Sequence of Applicators associated with Beam.​

 

 

 

 

Only a single Item is permitted in this Sequence.​

 

>>Applicator ID​

(300A,0108)​

1​

User or machine supplied identifier for Applicator.​

 

>>Accessory Code​

(300A,00F9)​

3​

Anaccessoryidentifiertobereadbyadevicesuchasabarcodereader.​

>>Applicator Type​

(300A,0109)​

1​

Type of applicator.​

 

 

 

 

 

Defined Terms:​

 

 

 

 

 

ION_SQUARE​

square ion applicator​

 

 

 

 

ION_RECT​

rectangular ion applicator​

 

 

 

 

ION_CIRC​

circular ion applicator​

 

 

 

 

ION_SHORT​

short ion applicator​

 

 

 

 

ION_OPEN​

open (dummy) ion applicator​

 

 

 

 

INTRAOPERATIVE​intraoperative (custom) applicator​

 

 

 

 

STEREOTACTIC​ stereotactic applicator​

 

>>Applicator Description​

(300A,010A)​

3​

User-defined description for Applicator.​

 

>General Accessory​

(300A,0420)​

3​

A Sequence of General Accessories associated with this Beam.​

Sequence​

 

 

One or more Items are permitted in this Sequence.​

 

 

 

 

 

>>General Accessory​

(300A,0424)​

1​

IdentificationNumberoftheGeneralAccessory.Thevalueshallbeunique​

Number​

 

 

within the Sequence.​

 

>>General Accessory ID​

(300A,0421)​

1​

User or machine supplied identifier for General Accessory.​

 

>>General Accessory​

(300A,0422)​

3​

User supplied description of General Accessory.​

 

Description​

 

 

 

 

 

>>General Accessory Type​

(300A,0423)​

3​

Specifies the type of accessory.​

 

 

 

 

Defined Terms:​

 

 

 

 

 

GRATICULE​

Accessory tray with a radio-opaque grid​

 

 

 

IMAGE_DETECTOR​Image acquisition device positioned in the beam​

 

 

 

 

line​

 

 

 

 

RETICLE​

Accessory tray with radio-transparent markers or​

 

 

 

 

grid​

 

>>Accessory Code​

(300A,00F9)​

3​

Machine-readable identifier for this accessory​

 

>>Isocenter to General​

(300A,0426)​

3​

Isocenter to general accessory distance (in mm) for current accessory.​

Accessory Distance​

 

 

See Section C.8.8.25.10.​

 

 

 

 

 

>Number of Range Shifters​

(300A,0312)​

1​

Number of range shifters associated with current beam.​

 

>Range Shifter Sequence​

(300A,0314)​

1C​

Sequence of range shifters associated with Beam.​

 

 

 

 

Required if Number of Range Shifters (300A,0312) is non-zero.​

The number of Items shall be identical to the value of Number of Range​

Shifters (300A,0312).​

- Standard -​

Page 812​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Description​

>>Range Shifter Number​

(300A,0316)​

1​

Identification number of the Range Shifter. The value of Range Shifter​

 

 

 

Number (300A,0316) shall be unique within the Beam in which it is​

 

 

 

created.​

>>Range Shifter ID​

(300A,0318)​

1​

User or machine supplied identifier for Range Shifter.​

>>Accessory Code​

(300A,00F9)​

3​

Anaccessoryidentifiertobereadbyadevicesuchasabarcodereader.​

>>Range Shifter Type​

(300A,0320)​

1​

Type of Range Shifter.​

 

 

 

Defined Terms:​

 

 

 

ANALOG​Device is variable thickness and is composed of opposing​

 

 

 

sliding wedges, water column or similar mechanism.​

 

 

 

BINARY​Device is composed of different thickness materials that can​

 

 

 

be moved in or out of the beam in various stepped​

 

 

 

combinations.​

>>RangeShifterDescription​

(300A,0322)​

3​

User defined description of Range Shifter.​

>Number of Lateral​

(300A,0330)​

1​

Number of lateral spreading devices associated with current beam.​

Spreading Devices​

 

 

 

>Lateral Spreading Device​

(300A,0332)​

1C​

Sequence of lateral spreading devices associated with Beam.​

Sequence​

 

 

Required if Number of Lateral Spreading Devices (300A,0330) is​

 

 

 

 

 

 

non-zero.​

 

 

 

The number of Items shall be identical to the value of Number of Lateral​

 

 

 

Spreading Devices (300A,0330).​

>>Lateral Spreading Device​

(300A,0334)​

1​

IdentificationnumberoftheLateralSpreadingDevice.ThevalueofLateral​

Number​

 

 

Spreading Device Number (300A,0334) shall be unique within the Beam​

 

 

 

in which it is created.​

>>Lateral Spreading Device​

(300A,0336)​

1​

User or machine supplied identifier for Lateral Spreading Device.​

ID​

 

 

 

>>Accessory Code​

(300A,00F9)​

3​

Anaccessoryidentifiertobereadbyadevicesuchasabarcodereader.​

>>Lateral Spreading Device​

(300A,0338)​

1​

Type of Lateral Spreading Device.​

Type​

 

 

Defined Terms:​

 

 

 

 

 

 

SCATTERER​metal placed into the beam path to scatter charged​

 

 

 

particles laterally.​

 

 

 

MAGNET​ nozzle configuration of magnet devices to expand beam​

 

 

 

laterally.​

>>Lateral Spreading Device​

(300A,033A)​

3​

User-defined description for lateral spreading device.​

Description​

 

 

 

>Number of Range​

(300A,0340)​

1​

Number of range modulators associated with current beam.​

Modulators​

 

 

 

>Range Modulator​

(300A,0342)​

1C​

Sequence of range modulators associated with Beam.​

Sequence​

 

 

Required if Number of Range Modulators (300A,0340) is non-zero.​

 

 

 

 

 

 

The number of Items shall be identical to the value of Number of Range​

 

 

 

Modulators (300A,0340).​

>>RangeModulatorNumber​

(300A,0344)​

1​

Identification number of the Range Modulator. The value of Range​

 

 

 

ModulatorNumber(300A,0344)shallbeuniquewithintheBeaminwhich​

 

 

 

it is created.​

>>Range Modulator ID​

(300A,0346)​

1​

User or machine supplied identifier for Range Modulator.​

>>Accessory Code​

(300A,00F9)​

3​

Anaccessoryidentifiertobereadbyadevicesuchasabarcodereader.​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 813​

Attribute Name​

Tag​

Type​

 

Description​

 

>>Range Modulator Type​

(300A,0348)​

1​

Type of Range Modulator.​

 

 

 

 

Defined Terms:​

 

 

 

 

 

FIXED​

fixed modulation width and weights using ridge​

 

 

 

 

filterorconstantspeedwheelwithconstantbeam​

 

 

 

 

current​

 

 

 

 

WHL_FIXEDWEIGHTS​selected wheel/track (Range Modulator ID) is​

 

 

 

 

spinning at constant speed. Modulation width is​

 

 

 

 

adjusted by switching constant beam current on​

 

 

 

 

and off at wheel steps indicated by Range​

 

 

 

 

Modulator Gating Values.​

 

 

 

 

WHL_MODWEIGHTS​selected wheel/track (Range Modulator ID) is​

 

 

 

 

spinning at constant speed. Weight per wheel​

 

 

 

 

step is adjusted by modulating beam current​

 

 

 

 

according to selected Beam Current Modulation​

 

 

 

 

ID (300A,034C).​

 

 

 

 

Only one Item in the Range Modulator Sequence (300A,0342) can have​

 

 

 

a Range Modulator Type (300A,0348) of WHL_MODWEIGHTS.​

>>Range Modulator​

(300A,034A)​

3​

User-defined description of Range Modulator.​

 

Description​

 

 

 

 

 

>>BeamCurrentModulation​

(300A,034C)​

1C​

User-suppliedidentifierforthebeamcurrentmodulationpattern.Required​

ID​

 

 

if Range Modulator Type (300A,0348) is WHL_MODWEIGHTS​

>Include Table C.8.8.28-1 “Patient Support Identification​

 

 

 

Macro Attributes”​

 

 

 

 

 

>Fixation Light Azimuthal​

(300A,0356)​

3​

Azimuthal angle (degrees) of the fixation light coordinate around IEC​

Angle​

 

 

BEAM LIMITING DEVICE Y-axis. Used for eye treatments. See​

 

 

 

Section C.8.8.25.6.4.​

 

 

>Fixation Light Polar Angle​

(300A,0358)​

3​

Polar angle (degrees) of the fixation light coordinate. Used for eye​

 

 

 

treatments. See Section C.8.8.25.6.4.​

 

>Fixation Eye​

(300A,0150)​

3​

The eye used for fixation.​

 

 

 

 

Enumerated Values:​

 

 

 

 

 

L​left eye​

 

 

 

 

 

R​right eye​

 

 

>Final Cumulative Meterset​

(300A,010E)​

1C​

Value of Cumulative Meterset Weight (300A,0134) for final Control Point​

Weight​

 

 

in Ion Control Point Sequence (300A,03A8). Required if Cumulative​

 

 

 

Meterset Weight is non-null in Control Points specified within Ion Control​

 

 

 

Point Sequence. See Section C.8.8.14.1.​

 

>Number of Control Points​

(300A,0110)​

1​

Number of control points in Beam. Value shall be greater than or equal​

 

 

 

to 2.​

 

 

>IonControlPointSequence​

(300A,03A8)​

1​

Sequence of machine configurations describing Ion treatment beam.​

 

 

 

The number of Items shall be identical to the value of Number of Control​

 

 

 

Points (300A,0110).​

 

 

 

 

 

See Section C.8.8.25.7.​

 

>>Control Point Index​

(300A,0112)​

1​

Index of current Control Point, starting at 0 for first Control Point.​

>>Cumulative Meterset​

(300A,0134)​

2​

Cumulative weight to current control point. Cumulative Meterset Weight​

Weight​

 

 

for the first Item in Control Point Sequence shall always be zero.​

 

 

 

Cumulative Meterset Weight for the final Item in Ion Control Point​

 

 

 

Sequence shall always be equal to Final Cumulative Meterset Weight.​

- Standard -​

Page 814​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Description​

>>Referenced Dose​

(300C,0050)​

3​

A Sequence of Dose References for current Beam.​

Reference Sequence​

 

 

One or more Items are permitted in this Sequence.​

 

 

 

>>>Referenced Dose​

(300C,0051)​

1​

UniquelyidentifiesDoseReferencespecifiedbyDoseReferenceNumber​

Reference Number​

 

 

(300A,0012)inDoseReferenceSequence(300A,0010)inRTPrescription​

 

 

 

Module.​

>>>Cumulative Dose​

(300A,010C)​

2​

CoefficientusedtocalculatecumulativedosecontributionfromthisBeam​

Reference Coefficient​

 

 

to the referenced Dose Reference at the current Control Point.​

>>Nominal Beam Energy​

(300A,0114)​

1C​

Nominal Beam Energy at control point in MeV per nucleon. Defined at​

 

 

 

nozzle entrance before all Beam Modifiers. Required for first Item of​

 

 

 

Control Point Sequence, or if Nominal Beam Energy changes during​

 

 

 

Beam, and KVP (0018,0060) is not present.​

>>KVP​

(0018,0060)​

1C​

Peak kilo voltage output of the setup X-Ray generator to be used.​

 

 

 

Required for first Item of Control Point Sequence, or if kVp changes​

 

 

 

during setup, and Nominal Beam Energy (300A,0114) is not present.​

>>Meterset Rate​

(300A,035A)​

3​

Specifies the speed of delivery of the specified dose in units specified​

 

 

 

by Primary Dosimeter Unit (300A,00B3) per minute.​

>>Ion Wedge Position​

(300A,03AC)​

1C​

Sequence of Wedge positions for current control point.​

Sequence​

 

 

RequiredforfirstItemofIonControlPointSequenceifNumberofWedges​

 

 

 

 

 

 

(300A,00D0) is non-zero, and in subsequent control points if Wedge​

 

 

 

Position(300A,0118)orWedgeThinEdgePosition(300A,00DB)changes​

 

 

 

during beam.​

 

 

 

ThenumberofItemsshallbeidenticaltothevalueofNumberofWedges​

 

 

 

(300A,00D0).​

>>>Referenced Wedge​

(300C,00C0)​

1​

Uniquely references Wedge described by Wedge Number (300A,00D2)​

Number​

 

 

in Wedge Sequence (300A,00D1).​

>>>Wedge Position​

(300A,0118)​

1​

Position of Wedge at current Control Point.​

 

 

 

Enumerated Values:​

 

 

 

IN​

 

 

 

OUT​

>>>Wedge Thin Edge​

(300A,00DB)​

1C​

Closest distance from the central axis of the beam along a wedge axis​

Position​

 

 

tothethinedgeasprojectedtothemachineisocentricplane(mm).Value​

 

 

 

is positive is the wedge does not cover the central axis, negative if it​

 

 

 

does. Required if Wedge Type (300A,00D3) of the wedge referenced by​

 

 

 

Referenced Wedge Number (300C,00C0) is PARTIAL_STANDARD or​

 

 

 

PARTIAL_MOTORIZ. See Section C.8.8.25.6.4.​

>>Range Shifter Settings​

(300A,0360)​

1C​

Sequence of Range Shifter settings for the current control point.​

Sequence​

 

 

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

 

 

 

 

 

 

Required for first Item of Control Point Sequence if Number of Range​

 

 

 

Shifters(300A,0312)isnon-zero,orifRangeShifterSetting(300A,0362)​

 

 

 

changes during Beam.​

>>>Referenced Range​

(300C,0100)​

1​

Uniquely references Range Shifter described by Range Shifter Number​

Shifter Number​

 

 

(300A,0316) in Range Shifter Sequence (300A,0314).​

>>>Range Shifter Setting​

(300A,0362)​

1​

Machine specific setting Attribute for the range shifter. The specific​

 

 

 

encoding of this value should be documented in a Conformance​

 

 

 

Statement. See Section C.8.8.25.5.​

>>>Isocenter to Range​

(300A,0364)​

3​

Isocenter to downstream edge of range shifter (mm) at current control​

Shifter Distance​

 

 

point. See Section C.8.8.25.4 and Section C.8.8.25.10​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 815​

Attribute Name​

Tag​

Type​

Description​

 

>>>Range Shifter Water​

(300A,0366)​

3​

Waterequivalentthickness(inmm)oftherangeshifteratthecentralaxis​

Equivalent Thickness​

 

 

for the beam energy incident upon the device.​

 

>>Lateral Spreading Device​

(300A,0370)​

1C​

Sequence of Lateral Spreading Device settings for the current control​

Settings Sequence​

 

 

point.​

 

 

 

 

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

 

 

 

 

Required for first Item of Control Point Sequence if Number of Lateral​

 

 

 

Spreading Devices (300A,0330) is non-zero, or if Lateral Spreading​

 

 

 

Device Setting (300A,0372) changes during Beam.​

 

>>>Referenced Lateral​

(300C,0102)​

1​

Uniquely references Lateral Spreading Device described by Lateral​

Spreading Device Number​

 

 

Spreading Device Number (300A,0334) in Lateral Spreading Device​

 

 

 

Sequence (300A,0332).​

 

>>>Lateral Spreading​

(300A,0372)​

1​

Machine specific setting Attribute for the lateral spreading device. The​

Device Setting​

 

 

specific encoding of this value should be documented in a Conformance​

 

 

 

Statement. See Section C.8.8.25.5.​

 

>>>Isocenter to Lateral​

(300A,0374)​

3​

Isocenter to downstream edge of Lateral Spreading Device (mm) at​

Spreading Device Distance​

 

 

current control point. See Section C.8.8.25.4 and Section C.8.8.25.10​

>>>Lateral Spreading​

(300A,033C)​

3​

Water equivalent thickness (in mm) of the lateral spreading device at the​

Device Water Equivalent​

 

 

central axis for the beam energy incident upon the device.​

 

Thickness​

 

 

 

 

>>RangeModulatorSettings​

(300A,0380)​

1C​

Sequence of Range Modulator Settings for current control point.​

Sequence​

 

 

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

 

 

 

 

 

 

 

 

Required for first Item of Control Point Sequence if Number of Range​

 

 

 

Modulators (300A,0340) is non-zero, or if Range Modulator Setting​

 

 

 

changes during Beam.​

 

>>>Referenced Range​

(300C,0104)​

1​

Uniquely references Range Modulator described by Range Modulator​

Modulator Number​

 

 

Number (300A,0344) in Range Modulator Sequence (300A,0342).​

>>>RangeModulatorGating​

(300A,0382)​

1C​

Start position defines the range modulator position at which the beam is​

Start Value​

 

 

switchedon.RequiredifRangeModulatorType(300A,0348)oftherange​

 

 

 

modulator referenced by Referenced Range Modulator Number​

 

 

 

(300C,0104) is WHL_MODWEIGHTS or WHL_FIXEDWEIGHTS​

>>>RangeModulatorGating​

(300A,0384)​

1C​

Stop position defines the range modulator position at which the beam is​

Stop Value​

 

 

switchedoff.RequiredifRangeModulatorType(300A,0348)oftherange​

 

 

 

modulator referenced by Referenced Range Modulator Number​

 

 

 

(300C,0104) is WHL_MODWEIGHTS or WHL_FIXEDWEIGHTS​

>>>RangeModulatorGating​

(300A,0386)​

3​

If Range Modulator Type (300A,0348) is WHL_MODWEIGHTS or​

Start Water Equivalent​

 

 

WHL_FIXEDWEIGHTS:​

 

Thickness​

Waterequivalentthickness(inmm)oftherangemodulatorattheposition​ specified by Range Modulator Gating Start Value (300A,0382).​

If Range Modulator Type (300A,0348) is FIXED:​

Minimum water equivalent thickness (in mm) of the range modulator.​

- Standard -​