Материал: part03

DICOM PS3.3 2020a - Information Object Definitions​

Page 731​

Attribute Name​

Tag​

Type​

Attribute Description​

>>ROI Physical Property​

(3006,00B2)​

1​

Defined Terms:​

REL_MASS_DENSITY​mass density relative to water​

REL_ELEC_DENSITY​electron density relative to water​

EFFECTIVE_Z​

effective atomic number​

EFF_Z_PER_A​

ratio of effective atomic number to mass​

(AMU-1)​

relative to linear stopping power of water​

>>ROI Elemental​

(3006,00B6)​

1C​

Composition Sequence​

the elements in the ROI.​

Required if ROI Physical Property (3006,00B2) equals​

ELEM_FRACTION.​

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

>>>ROI Elemental​

(3006,00B7)​

1​

CompositionAtomicNumber​

Composition Sequence (3006,00B6) is present.​

>>>ROI Elemental​

(3006,00B8)​

1​

Composition Atomic Mass​

Composition Sequence (3006,00B6) is present.​

Fraction​

precision.​

>>ROI Physical Property​

(3006,00B4)​

1​

User-assigned value for physical property.​

Value​

Note​

DICOM PS3.3 2020a - Information Object Definitions​

Page 733​

Attribute Name​

Tag​

Type​

Attribute Description​

>RT Plan Relationship​

(300A,0055)​

1​

Relationship of referenced plan with respect to current plan.​

Defined Terms:​

PRIOR​

plan delivered prior to current treatment​

ALTERNATIVE​

alternative plan prepared for current​

treatment​

PREDECESSOR​plan used in derivation of current plan​

VERIFIED_PLAN​plan that is verified using the current plan.​

This value shall only be used if Plan Intent​

(300A,000A) is present and has a value of​

VERIFICATION​

CONCURRENT​ plan that forms part of a set of two or more​

RT Plan instances representing a single​

conceptual 'plan', applied in parallel in one​

treatment phase​

Frame of Reference to​

(0070,030B)​

3​

A 4x4 transformation matrix that transforms a coordinate of the​

DisplayedCoordinateSystem​

Frame of Reference to a displayed coordinate system.​

Attribute Name​

Tag​

Type​

Attribute Description​

Prescription Description​

(300A,000E)​

3​ User-defined description of treatment prescription.​

Dose Reference Sequence​

(300A,0010)​

3​ Sequence of Dose References.​

One or more Items are permitted in this Sequence.​

>Dose Reference Number​

(300A,0012)​

1​ Identification number of the Dose Reference. The value of Dose​

Reference Number (300A,0012) shall be unique within the RT Plan​

in which it is created.​

>Dose Reference UID​

(300A,0013)​

3​ A unique identifier for a Dose Reference that can be used to link the​

same entity across multiple RT Plan objects.​

Page 734​

Attribute Name​

Tag​

Type​

Attribute Description​

>Dose Reference Structure​

(300A,0014)​

1​

Structure type of Dose Reference.​

Type​

Defined Terms:​

POINT​

dose reference point specified as ROI​

VOLUME​

dose reference volume specified as ROI​

COORDINATES​pointspecifiedbyDoseReferencePointCoordinates​

(300A,0018)​

SITE​

dose reference clinical site​

>Dose Reference Description​

(300A,0016)​

3​

User-defined description of Dose Reference.​

>Referenced ROI Number​

(3006,0084)​

1C​

Uniquely identifies ROI representing the dose reference specified by​

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

in Structure Set Module within RT Structure Set in Referenced​

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

Required if Dose Reference Structure Type (300A,0014) is POINT or​

VOLUME.​

>Dose Reference Point​

(300A,0018)​

1C​

Coordinates(x,y,z)ofReferencePointinthePatient-BasedCoordinate​

Coordinates​

System described in Section C.7.6.2.1.1 (mm). Required if Dose​

Reference Structure Type (300A,0014) is COORDINATES.​

>Nominal Prior Dose​

(300A,001A)​

3​

Dose (in Gy) from prior treatment to this Dose Reference (e.g., from​

a previous course of treatment).​

>Dose Reference Type​

(300A,0020)​

1​

Type of Dose Reference.​

Defined Terms:​

TARGET​

treatment target (corresponding to GTV, PTV, or​

CTV in [ICRU Report 50])​

ORGAN_AT_RISK​Organ at Risk (as defined in [ICRU Report 50])​

>Constraint Weight​

(300A,0021)​

3​

Relative importance of satisfying constraint, where high values​

represent more important constraints.​

>Delivery Warning Dose​

(300A,0022)​

3​

The dose (in Gy) that when reached or exceeded should cause some​

action to be taken.​

>Delivery Maximum Dose​

(300A,0023)​

3​

Themaximumdose(inGy)thatcanbedeliveredtothedosereference.​

>Target Minimum Dose​

(300A,0025)​

3​

Minimumpermitteddose(inGy)toDoseReferenceifDoseReference​

Type (300A,0020) is TARGET.​

>Target Prescription Dose​

(300A,0026)​

3​

Prescribed dose (in Gy) to Dose Reference if Dose Reference Type​

(300A,0020) is TARGET.​

>Target Maximum Dose​

(300A,0027)​

3​

Maximumpermitteddose(inGy)toDoseReferenceifDoseReference​

Type (300A,0020) is TARGET.​

>Target Underdose Volume​

(300A,0028)​

3​

Maximumpermittedfraction(inpercent)ofTargettoreceivelessthan​

Fraction​

the Target Prescription Dose if Dose Reference Type (300A,0020) is​

TARGET and Dose Reference Structure Type (300A,0014) is​

VOLUME. See Section C.8.8.10.1.​

>Organ at Risk Full-volume​

(300A,002A)​

3​

Maximum dose (in Gy) to entire Dose Reference if Dose Reference​

Dose​

Type(300A,0020)isORGAN_AT_RISKandDoseReferenceStructure​

Type (300A,0014) is VOLUME.​

>Organ at Risk Limit Dose​

(300A,002B)​

3​

Maximum permitted dose (in Gy) to any part of Dose Reference if​

Dose Reference Type (300A,0020) is ORGAN_AT_RISK and Dose​

Reference Structure Type (300A,0014) is VOLUME.​

>Organ at Risk Maximum​

(300A,002C)​

3​

Maximum dose (in Gy) to non-overdosed part of Dose Reference if​

Dose​

Dose Reference Type (300A,0020) is ORGAN_AT_RISK and Dose​

Reference Structure Type (300A,0014) is VOLUME.​

DICOM PS3.3 2020a - Information Object Definitions​

Page 735​

Attribute Name​

Tag​

Type​

Attribute Description​

>Organ at Risk Overdose​

(300A,002D)​

3​

Maximumpermittedfraction(inpercent)oftheOrganatRisktoreceive​

Volume Fraction​

more than the Organ at Risk Maximum Dose if Dose Reference Type​

(300A,0020) is ORGAN_AT_RISK and Dose Reference Structure​

Type (300A,0014) is VOLUME.​

Attribute Name​

Tag​

Type​

Attribute Description​

Tolerance Table Sequence​

(300A,0040)​

3​ Sequenceoftolerancetablestobeusedfordeliveryoftreatment​

plan.​

One or more Items are permitted in this Sequence.​

See Note 1.​

>Tolerance Table Number​

(300A,0042)​

1​ Identification number of the Tolerance Table. The value of​

Tolerance Table Number (300A,0042) shall be unique within the​

RT Plan in which it is created.​

>Tolerance Table Label​

(300A,0043)​

3​ User-defined label for Tolerance Table.​

>Gantry Angle Tolerance​

(300A,0044)​

3​ Maximum permitted difference (in degrees) between planned​

and delivered Gantry Angle.​

>Gantry Pitch Angle Tolerance​

(300A,014E)​

3​ Maximum permitted difference (in degrees) between planned​

and delivered Gantry Pitch Angle.​

>Beam Limiting Device Angle​

(300A,0046)​

3​ Maximum permitted difference (in degrees) between planned​

Tolerance​

and delivered Beam Limiting Device Angle.​

>Beam Limiting Device Tolerance​

(300A,0048)​

3​ Sequence of beam limiting device (collimator) tolerances. One​

Sequence​

or more Items are permitted in this Sequence.​

>>RT Beam Limiting Device Type​

(300A,00B8)​

1​ Type of beam limiting device (collimator).​

Enumerated Values:​

X​

symmetric jaw pair in IEC X direction​

Y​

symmetric jaw pair in IEC Y direction​

ASYMX​asymmetric jaw pair in IEC X direction​

ASYMY​asymmetric pair in IEC Y direction​

MLCX​multileaf (multi-element) jaw pair in IEC X direction​

MLCY​multileaf (multi-element) jaw pair in IEC Y direction​

>>Beam Limiting Device Position​

(300A,004A)​

1​ Maximum permitted difference (in mm) between planned and​

Tolerance​

deliveredleaf(element)orjawpositionsforcurrentbeamlimiting​

device (collimator).​

>Patient Support Angle Tolerance​

(300A,004C)​

3​ Maximum permitted difference (in degrees) between planned​

and delivered Patient Support Angle.​

>Table Top Eccentric Angle​

(300A,004E)​

3​ Maximum permitted difference (in degrees) between planned​

Tolerance​

and delivered Table Top Eccentric Angle.​

>Table Top Pitch Angle Tolerance​

(300A,004F)​

3​ Maximumpermitteddifference(indegrees)betweentheplanned​

and delivered Table Top Pitch Angle.​

>Table Top Roll Angle Tolerance​

(300A,0050)​

3​ Maximumpermitteddifference(indegrees)betweentheplanned​

and delivered Table Top Roll Angle.​