DICOM PS3.3 2020c - Information Object Definitions

C.31 Radiotherapy Workflow Modules (Current)
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## C.31 Radiotherapy Workflow Modules

### C.31.1 RT General Machine Verification Module

Table C.31-1 specifies the Attributes used to convey the parameters used in external verification of both conventional radiotherapy (photon or electron) and ion treatment deliveries.

Table C.31-1. RT General Machine Verification Module Attributes

Attribute Name | Tag | Description
--- | --- | ---
Referenced RT Plan Sequence | (300C,0002) | A reference to an RT Plan SOP Class/Instance pair. Only a single Item shall be included in this Sequence.
>Include Table 10-11 “SOP Instance Reference Macro Attributes” |
Referenced Fraction Group Number | (300C,0022) | Identifier of Fraction Group within referenced RT Plan.
Patient ID | (0010,0020) | Primary identifier for the patient.
Include Table 10-18 “Issuer of Patient ID Macro Attributes” |
Treatment Verification Status | (3008,002C) | Conditions under which treatment was verified by a verification system. Enumerated Values: VERIFIED treatment verified VERIFIED_OVR treatment verified with at least one out-of-range value overridden NOT_VERIFIED treatment failed verification (one or more values out of range and not overridden)
Failed Parameters Sequence | (0074,1048) | List of parameters that failed verification by the MPV. Zero or more Items shall be included in this Sequence. See Section C.31.1.1.
>Include Table 10-20 “Selector Attribute Macro Attributes” |
Overridden Parameters Sequence | (0074,104A) | List of parameters that were overridden by the user. Zero or more Items shall be included in this Sequence. See Section C.31.1.1.
>Include Table 10-20 “Selector Attribute Macro Attributes” |
>Operators' Name | (0008,1070) | Name of operator who authorized override of overridden parameter.
>Operator Identification Sequence | (0008,1072) | Identification of the operator who authorized override. Only a single Item is permitted in this Sequence.
>>Include Table 10-1 “Person Identification Macro Attributes Description”
>Override Reason | (3008,0066) | User-defined description of reason for override of overridden parameter.
General Machine Verification Sequence | (0074,1042) | Sequence containing general machine verification parameters. Zero or one Item shall be included in this Sequence.
>Specified Primary Meterset | (3008,0032) | Desired machine setting of primary Meterset. The units shall match those specified by Primary Dosimeter Unit (300A,00B3) in the plan specified in the Referenced RT Plan Sequence (300C,0002).
>Specified Secondary Meterset | (3008,0033) | Desired machine setting of secondary Meterset. The units shall match those specified for Specified Secondary Meterset (3008,0033) in the plan specified in the Referenced RT Plan Sequence (300C,0002).
>Specified Treatment Time | (3008,003A) | Treatment Time set in seconds.
>Beam Limiting Device Leaf Pairs Sequence | (3008,00A0) | Beam limiting device (collimator) jaw or leaf (element) leaf pair values. One or more Items shall be included in this Sequence.
>>RT Beam Limiting Device Type | (300A,00B8) | 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
>>Number of Leaf/Jaw Pairs | (300A,00BC) | Number of leaf (element) or jaw pairs (equal to 1 for standard beam limiting device jaws).
>Recorded Wedge Sequence | (3008,00B0) | Treatment wedges present during delivered Beam. Zero or more Items shall be included in this Sequence.
>>Wedge Number | (300A,00D2) | Identification number of the Wedge. The value of Wedge Number (300A,00D2) shall be unique within the Wedge Sequence.
>>Wedge ID | (300A,00D4) | User-supplied identifier for wedge.
>>Wedge Angle | (300A,00D5) | Nominal wedge angle delivered in degrees.
>>Wedge Orientation | (300A,00D8) | Orientation of wedge, i.e., orientation of the IEC WEDGE FILTER coordinate system with respect to the IEC BEAM LIMITING DEVICE coordinate system, in degrees.
>>Accessory Code | (300A,00F9) | An identifier for the accessory intended to be read by a device such as a bar-code reader.
>Recorded Compensator Sequence | (3008,00C0) | Treatment compensators associated with current Beam. Zero or more Items shall be included in this Sequence.
>>Compensator ID | (300A,00E5) | User-supplied identifier for compensator.
>>Accessory Code | (300A,00F9) | An identifier for the accessory intended to be read by a device such as a bar-code reader.
>>Compensator Tray ID | (300A,00EF) | User-supplied identifier for compensator tray.
>>Referenced Compensator Number | (300C,00D0) | Uniquely identifies compensator specified by Compensator Number (300A,00E4) within Beam referenced by Referenced Beam Number (300C,0006).
>Recorded Block Sequence | (3008,00D0) | Blocks associated with current Beam. Zero or more Items shall be included in this Sequence.
>>Block Tray ID | (300A,00F5) | User-supplied identifier for block tray or Electron Insert.
>>Accessory Code | (300A,00F9) | An identifier for the accessory intended to be read by a device such as a bar-code reader.
>>Referenced Block Number | (300C,00E0) | Uniquely identifies block specified by Block Number (300A,00FC) within Beam referenced by Referenced Beam Number (300C,0006).
>Treatment Machine Name | (300A,00B2) | User-defined name identifying treatment machine to be used for beam delivery. See Section C.8.8.25.2.
>Beam Name | (300A,00C2) | User-defined name for Beam.
>Radiation Type | (300A,00C6) | Particle type of Beam. Enumerated Values: PHOTON ELECTRON NEUTRON PROTON ION
>Number of Wedges | (300A,00D0) | Number of wedges associated with current Beam.
>Number of Compensators | (300A,00E0) | Number of compensators associated with current Beam.
>Number of Boli | (300A,00ED) | Number of boli used with current Beam.
>Number of Blocks | (300A,00F0) | Number of shielding blocks or Electron Inserts associated with Beam.
>Applicator Sequence | (300A,0107) | Applicators associated with Beam. Zero or more Items shall be included in this Sequence.
>>Accessory Code | (300A,00F9) | An identifier for the accessory intended to be read by a device such as a bar-code reader.
>>Applicator ID | (300A,0108) | User or machine supplied identifier for Applicator.
>>Applicator Type | (300A,0109) | Type of Applicator. Enumerated Values: ELECTRON_SQUARE square electron applicator ELECTRON_RECT rectangular electron applicator ELECTRON_CIRC circular electron applicator ELECTRON_SHORT short electron applicator ELECTRON_OPEN open (dummy) electron applicator INTRAOPERATIVE intraoperative (custom) applicator STEREOTACTIC stereotactic applicator
>Number of Control Points | (300A,0110) | Number of control points in Beam.
>Patient Setup Sequence | (300A,0180) | Patient setup data for current plan. One or more Items are permitted in this Sequence.
>>Patient Setup Number | (300A,0182) | Identification number of the Patient Setup.
>>Fixation Device Sequence | (300A,0190) | Fixation Devices used in Patient Setup. Zero or more Items shall be included in this Sequence.
>>>Accessory Code | (300A,00F9) | An identifier for the accessory intended to be read by a device such as a bar-code reader.
>>>Fixation Device Type | (300A,0192) | Type of Fixation Device used during Patient Setup. Enumerated Values: BITEBLOCK HEADFRAME MASK MOLD CAST HEADREST BREAST_BOARD BODY_FRAME VACUUM_MOLD WHOLE_BODY_POD RECTAL_BALLOON
>Referenced Beam Number | (300C,0006) | References Beam specified by Beam Number (300A,00C0) in Beam Sequence (300A,00B0) in RT Beams Module of referenced RT Plan or in Ion Beam Sequence (300A,03A2) in RT Ion Beams Module within the referenced RT Ion Plan.
>Referenced Bolus Sequence | (300C,00B0) | Boli associated with Beam. Zero or more Items shall be included in this Sequence.
>>Referenced ROI Number | (3006,0084) | Uniquely identifies ROI representing the Bolus specified by ROI Number (3006,0022) in Structure Set ROI Sequence (3006,0020) in Structure Set Module within RT Structure Set in Referenced Structure Set Sequence (300C,0060) in RT General Plan Module.
>>Accessory Code | (300A,00F9) | An accessory identifier to be read by a device such as a bar code reader.

#### C.31.1.1 Failed Parameters and Overridden Parameters

Each Verify Failed Parameter or Overridden Parameter is used to specify a verification Attribute that was either unverified (out of range), or overridden explicitly by the user. To uniquely identify both the context and value item of the Attribute occurrence, a special notation is used, described in Section 10.17.

If a Verify Failed Parameter or Overridden Parameter refers to an Attribute occurrence within a Control Point Sequence, then that Attribute occurrence was failed or overridden during the administration of the beam segment immediately prior to the specified control point.

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DICOM PS3.3 2020c - Information Object Definitions