DICOM PS3.3 2021b - Information Object Definitions

C.36.22 RT Radiation Record Common Module (Current)
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### C.36.22 RT Radiation Record Common Module

The RT Radiation Record Common Module contains treatment-modality-independent information about a delivered RT Radiation. A delivered RT Radiation may be radiation to a patient or radiation without a patient being present (e.g. for QA purposes).

Table C.36.22-1. RT Radiation Record Common Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Include Table 10.9.2-1, “Extended Content Identification Macro Attributes”
Include Table C.36.2.1.6-1, “RT Radiation Common Base Macro Attributes”
Treatment Session UID | (300A,0700) | 1 | Uniquely identifies the RT Treatment Session to which this instance belongs.
Referenced RT Instance Sequence | (300A,0631) | 1C | The RT Radiation SOP Instance that provided the instruction to deliver the radiation. Required if an RT Radiation SOP Instance was used to provide the instructions to the delivery system. Only a single Item shall be included in this Sequence. See Section C.36.10.1.2.
>Include Table 10-11, “SOP Instance Reference Macro Attributes”
RT Radiation Usage | (300A,0701) | 1 | A general indication of how the referenced RT Radiation was used. The Defined Terms are specified in Section C.36.10.1.1. This value may differ from the RT Radiation Set Intent (300A,0637) within the Instance referenced by the Referenced RT Radiation Set Sequence (300A,0702). See Section C.36.20.1.4.
Treatment Record Content Origin | (300A,0709) | 1 | The origin of the content of this SOP Instance. Enumerated Values: DEVICE The content has been recorded by the treatment device which performed the treatment delivery. USER The content has been constructed based on user inputs.
Treatment Delivery Continuation Flag | (300A,0708) | 1 | Indicates whether this SOP Instance represents the record of a treatment delivery which was a continuation of a previously interrupted treatment delivery of the RT Treatment Fraction specified by the RT Radiation Set Delivery Number (300A,0704). Enumerated Values: YES The record represents a continuation. NO The record represents a treatment delivery that was started at the first RT Control Point.
RT Treatment Termination Status | (300A,0714) | 1 | Termination status of the recorded treatment. Enumerated Values: NORMAL The delivery of the fraction represented by the referenced RT Radiation IOD terminated as expected and the fraction has been correctly delivered. ABNORMAL The delivery of the fraction represented by the referenced RT Radiation IOD did not terminate as expected and the fraction has been incorrectly delivered.
RT Treatment Termination Reason Code Sequence | (300A,0715) | 2C | Treatment machine termination code. This code is dependent upon the particular application and equipment. Required if RT Treatment Termination Status (300A,0714) is ABNORMAL. Zero or more items shall be included in this Sequence.
>Include Table 8.8-1, “Code Sequence Macro Attributes” | DCID 9561 “Treatment Termination Reasons”
Machine-Specific Treatment Termination Code Sequence | (300A,0716) | 3 | Machine-specific termination codes. One or more Items are permitted in this Sequence.
>Include Table 8.8-1, “Code Sequence Macro Attributes” | No Baseline CID is defined.
Treatment Termination Description | (300A,0730) | 2C | A user-readable description for an abnormal termination. Required if RT Treatment Termination Status (300A,0714) is ABNORMAL.
Treatment Tolerance Violation Sequence | (300A,0731) | 2 | Reports violations of tolerances that occurred during treatment delivery. Zero or more items shall be included in this Sequence.
>Treatment Tolerance Violation DateTime | (300A,0736) | 1 | Datetime when Treatment Tolerance Violation occurred.
>Treatment Tolerance Violation Category | (300A,0732) | 1 | The category of tolerance violation which was exceeded. Defined Terms: CLINICAL Delivery went out of clinically allowed tolerance. MACHINE Delivery went out of machine tolerance.
>Treatment Tolerance Violation Type Code Sequence | (300A,0761) | 1 | Type of treatment tolerance violation. One or more Items shall be included in this Sequence.
>>Include Table 8.8-1, “Code Sequence Macro Attributes” | If Treatment Tolerance Violation Category (300A,0732) has the value CLINICAL, Defined CID is 9566 "Clinical Tolerance Violation Types" If Treatment Tolerance Violation Category (300A,0732) has the value MACHINE, Defined CID is 9567 "Machine Tolerance Violation Types"
>Treatment Tolerance Violation Cause Code Sequence | (300A,0762) | 1 | Cause of treatment tolerance violation. One or more Items shall be included in this Sequence.
>>Include Table 8.8-1, “Code Sequence Macro Attributes” | DCID 9565 “Treatment Tolerance Violation Causes”
>Treatment Tolerance Violation Attribute Sequence | (300A,0733) | 2C | The Attribute whose value exceeded the tolerance. Required if the violation corresponds to an Attribute in the current SOP Instance. Zero or one Item shall be included in this Sequence.
>>Include Table 10-20a, “Extended Selector Attribute Macro Attributes”
>Treatment Tolerance Violation Identification | (300A,0735) | 1C | An identification of the parameter(s) which exceeded the tolerance, intended for structured processing. Required if Treatment Tolerance Violation Attribute Sequence (300A,0733) is not present or has zero Items. May be present otherwise.
>Treatment Tolerance Violation Description | (300A,0734) | 1C | User-defined description of the treatment tolerance violation. This information is intended for display to human readers. Shall not be used for structured processing. Required if Treatment Tolerance Violation Attribute Sequence (300A,0733) is not present or has zero Items. May be present otherwise.
>Override Sequence | (3008,0060) | 2 | Overrides of this treatment tolerance violation, including the authorization by a qualified person to continue treatment delivery. Zero or one Items shall be included in this Sequence.
>>Operator Identification Sequence | (0008,1072) | 1 | Identification of the operator who authorized the override. One or more Items shall be present.
>>>Include Table C.17-3b, “Identified Person or Device Macro Attributes” | The Observer Type (0040,A084) shall be PSN.
>>Override DateTime | (300A,0760) | 1 | Date and Time when the user authorized the override.
>>Override Reason | (3008,0066) | 2 | User-defined reason of the override. May contain notes, e.g. on the justification why the treatment was delivered in the presence of an interlock or unexpected machine condition.
>>Alternate Value Sequence | (300A,073E) | 2 | The alternate value for the parameter as accepted by the user when the override was entered. The actual value applied during treatment may be different. Zero or one Item shall be included in this Sequence.
>>>Include Table 10-2, “Content Item Macro Attributes Description” | BCID 9570 “RT Overridden Treatment Parameters”
Confirmation Sequence | (300A,073F) | 2 | Records confirmations (sign-offs) by treatment session operators of details that may not be verified electronically (e.g. the presence of devices). Zero or more Items shall be included in this Sequence.
>Include Table 10.30-1, “Assertion Macro Attributes” | Assertion Code Sequence (0044,0101) BCID 9564 “Treatment Session Confirmation Assertions”.
Interlock Sequence | (300A,0740) | 2 | Interlocks which occurred prior, during or after the delivery of radiation covered by this SOP Instance. Zero or more Items shall be included in this Sequence.
>Interlock DateTime | (300A,0741) | 1 | Date and Time when the Interlock occurred. The date and time of occurrence may be when the interlock occurred (e.g. by a real-time system) or when the interlock was recorded. See Section C.7.4.2.1.4.
>Interlock Description | (300A,0742) | 1 | User-readable description of the interlock.
>Interlock Origin Description | (300A,0783) | 1C | Description of the origin of the interlock. Required if Interlock Originating Device Sequence (300A,0743) is not present.
>Interlock Originating Device Sequence | (300A,0743) | 1C | Contains the attributes that identify the device that originated the interlock. Only a single Item shall be included in this Sequence. Required if Interlock Origin Description (300A,0783) is not present.
>>Include Table 10.36-1, “Device Identification Macro Attributes” | No Baseline CID is defined.
>Interlock Code Sequence | (300A,0744) | 1 | Code(s) that describe the interlock(s) that occurred. One or more Items shall be included in this Sequence.
>>Include Table 8.8-1, “Code Sequence Macro Attributes” | BCID 9568 “Treatment Interlocks”.
>Interlock Resolution Code Sequence | (300A,0745) | 1 | The action applied to resolve the interlock. One or more Items shall be included in this Sequence.
>>Include Table 8.8-1, “Code Sequence Macro Attributes” | DCID 9563 “Interlock Resolutions”
>Interlock Resolution User Sequence | (300A,0746) | 1 | The user that resolved the interlock. One or more Items shall be included in this Sequence.
>>Include Table 10-1, “Person Identification Macro Attributes Description”
Additional Parameter Recording Instance Sequence | (300A,0780) | 3 | SOP Instances that contain additional recording of treatment parameters. One or more Items are permitted in this Sequence. See Section C.36.22.1.1.
>Include Table 10-11, “SOP Instance Reference Macro Attributes”
>Creator-Version UID | (0008,9123) | 1C | Unique identification of the equipment and version of the software that has created the referenced Instance that contains the additional parameters. The UID allows one to avoid attempting to interpret the additional parameters with an unknown format. Required if the Referenced SOP Class UID (0008,1150) is Raw Data Storage ("1.2.840.10008.5.1.4.1.1.66"). May be present otherwise. ### Note This value corresponds to the Creator-Version UID of a referenced Raw Data SOP Instance.

#### C.36.22.1 RT Radiation Record Common Attribute Descriptions

##### C.36.22.1.1 Additional Parameter Recording Instance Sequence

The Additional Parameter Recording Instance Sequence (300A,0780) allows referencing of a SOP Instance which contains additional parameters recorded during the delivery. For example, the recording may be high-frequency samples of certain parameters to allow in-depth analysis for quality assurance or other purposes.

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DICOM PS3.3 2021b - Information Object Definitions