CodeX Radiation Therapy
2.0.0 - STU2 United States of America flag

CodeX Radiation Therapy, published by HL7 International / Cross-Group Projects. This guide is not an authorized publication; it is the continuous build for version 2.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/codex-radiation-therapy/ and changes regularly. See the Directory of published versions

Extension: RadiotherapyEnergyOrIsotope - Detailed Descriptions

Active as of 2024-12-18

Definitions for the codexrt-radiotherapy-energy-or-isotope extension.

Guidance on how to interpret the contents of this table can be found here

0. Extension
Definition

The radiation energy used for radiotherapy. The energy spectrum is characterized by the maximum energy, the maximum acceleration voltage, or the used isotope.

ShortRadiotherapy Energy or Isotope
2. Extension.extension
Control0..0
4. Extension.url
Fixed Valuehttp://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope
6. Extension.value[x]
Control1..?
TypeChoice of: CodeableConcept, Quantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] NoteSeeChoice of Data Typesfor further information about how to use [x]
SlicingThis element introduces a set of slices on Extension.value[x]. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • type @ $this
  • 8. Extension.value[x]:valueQuantity
    Slice NamevalueQuantity
    ShortThe spectrum of radiation energy characterized by a maximum value. For electrons, the maximum energy is given in MeV. For photons, the maximum acceleration voltage is given in MV or kV, although those are not units of energy.
    Control0..1
    BindingThe codes SHALL be taken from Radiotherapy Energy Unit Value Set
    (required to http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-energy-unit-vs)
    TypeQuantity(SimpleQuantity)
    [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
    10. Extension.value[x]:valueQuantity.value
    Control1..?
    12. Extension.value[x]:valueQuantity.system
    Control1..?
    14. Extension.value[x]:valueQuantity.code
    Control1..?
    16. Extension.value[x]:valueCodeableConcept
    Slice NamevalueCodeableConcept
    ShortThe isotope used for radiotherapy.
    Control0..1
    BindingUnless not suitable, these codes SHALL be taken from Radiotherapy Isotope Value Set
    (extensible to http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-isotope-vs)
    TypeCodeableConcept
    [x] NoteSeeChoice of Data Typesfor further information about how to use [x]

    Guidance on how to interpret the contents of this table can be found here

    0. Extension
    Definition

    The radiation energy used for radiotherapy. The energy spectrum is characterized by the maximum energy, the maximum acceleration voltage, or the used isotope.


    Optional Extension Element - found in all resources.

    ShortRadiotherapy Energy or IsotopeOptional Extensions Element
    Control0..*
    This element is affected by the following invariants: ele-1
    Is Modifierfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    2. Extension.extension
    Definition

    An Extension


    May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

    ShortExtensionAdditional content defined by implementations
    Comments

    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

    Control0..0*
    TypeExtension
    Is Modifierfalse
    Summaryfalse
    Alternate Namesextensions, user content
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    SlicingThis element introduces a set of slices on Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
    • value @ url
    • 4. Extension.url
      Definition

      Source of the definition for the extension code - a logical name or a URL.

      Shortidentifies the meaning of the extension
      Comments

      The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.

      Control1..1
      Typeuri
      Is Modifierfalse
      XML FormatIn the XML format, this property is represented as an attribute.
      Summaryfalse
      Fixed Valuehttp://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope
      6. Extension.value[x]
      Definition

      Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

      ShortValue of extension
      Control10..1
      TypeChoice of: CodeableConcept, Quantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
      [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
      Is Modifierfalse
      Summaryfalse
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      SlicingThis element introduces a set of slices on Extension.value[x]. The slices areUnordered and Closed, and can be differentiated using the following discriminators:
      • type @ $this
      • 8. Extension.value[x]:valueQuantity
        Slice NamevalueQuantity
        Definition

        The comparator is not used on a SimpleQuantity


        Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

        ShortThe spectrum of radiation energy characterized by a maximum value. For electrons, the maximum energy is given in MeV. For photons, the maximum acceleration voltage is given in MV or kV, although those are not units of energy.Value of extension
        Comments

        The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.

        Control0..1
        This element is affected by the following invariants: ele-1
        BindingThe codes SHALL be taken from For codes, see Radiotherapy Energy Unit Value Set
        (required to http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-energy-unit-vs)
        TypeQuantity(SimpleQuantity), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
        [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
        Is Modifierfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        qty-3: If a code for the unit is present, the system SHALL also be present (code.empty() or system.exists())
        sqty-1: The comparator is not used on a SimpleQuantity (comparator.empty())
        10. Extension.value[x]:valueQuantity.value
        Definition

        The value of the measured amount. The value includes an implicit precision in the presentation of the value.

        ShortNumerical value (with implicit precision)
        Comments

        The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).

        Control10..1
        Typedecimal
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summarytrue
        Requirements

        Precision is handled implicitly in almost all cases of measurement.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        12. Extension.value[x]:valueQuantity.comparator
        Definition

        Not allowed to be used in this context


        How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.

        Short< | <= | >= | > - how to understand the value
        Control0..01
        BindingThe codes SHALL be taken from QuantityComparatorhttp://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
        (required to http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1)

        How the Quantity should be understood and represented.

        Typecode
        Is Modifiertrue because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summarytrue
        Requirements

        Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.

        Meaning if MissingIf there is no comparator, then there is no modification of the value
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        14. Extension.value[x]:valueQuantity.system
        Definition

        The identification of the system that provides the coded form of the unit.

        ShortSystem that defines coded unit form
        Control10..1
        This element is affected by the following invariants: qty-3
        Typeuri
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summarytrue
        Requirements

        Need to know the system that defines the coded form of the unit.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        16. Extension.value[x]:valueQuantity.code
        Definition

        A computer processable form of the unit in some unit representation system.

        ShortCoded form of the unit
        Comments

        The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.

        Control10..1
        Typecode
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Summarytrue
        Requirements

        Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.

        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        18. Extension.value[x]:valueCodeableConcept
        Slice NamevalueCodeableConcept
        Definition

        Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

        ShortThe isotope used for radiotherapy.Value of extension
        Control0..1
        BindingUnless not suitable, these codes SHALL be taken from For codes, see Radiotherapy Isotope Value Set
        (extensible to http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-isotope-vs)
        TypeCodeableConcept, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
        [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

        Guidance on how to interpret the contents of this table can be found here

        0. Extension
        Definition

        The radiation energy used for radiotherapy. The energy spectrum is characterized by the maximum energy, the maximum acceleration voltage, or the used isotope.

        ShortRadiotherapy Energy or Isotope
        Control0..*
        This element is affected by the following invariants: ele-1
        Is Modifierfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        2. Extension.id
        Definition

        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

        ShortUnique id for inter-element referencing
        Control0..1
        Typestring
        Is Modifierfalse
        XML FormatIn the XML format, this property is represented as an attribute.
        Summaryfalse
        4. Extension.extension
        Definition

        An Extension

        ShortExtension
        Control0..0
        TypeExtension
        Is Modifierfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
        SlicingThis element introduces a set of slices on Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
        • value @ url
        • 6. Extension.url
          Definition

          Source of the definition for the extension code - a logical name or a URL.

          Shortidentifies the meaning of the extension
          Comments

          The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.

          Control1..1
          Typeuri
          Is Modifierfalse
          XML FormatIn the XML format, this property is represented as an attribute.
          Summaryfalse
          Fixed Valuehttp://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope
          8. Extension.value[x]
          Definition

          Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

          ShortValue of extension
          Control1..1
          TypeChoice of: CodeableConcept, Quantity(SimpleQuantity)
          [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
          Is Modifierfalse
          Summaryfalse
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
          SlicingThis element introduces a set of slices on Extension.value[x]. The slices areUnordered and Closed, and can be differentiated using the following discriminators:
          • type @ $this
          • 10. Extension.value[x]:valueQuantity
            Slice NamevalueQuantity
            Definition

            The comparator is not used on a SimpleQuantity

            ShortThe spectrum of radiation energy characterized by a maximum value. For electrons, the maximum energy is given in MeV. For photons, the maximum acceleration voltage is given in MV or kV, although those are not units of energy.
            Comments

            The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.

            Control0..1
            This element is affected by the following invariants: ele-1
            BindingThe codes SHALL be taken from Radiotherapy Energy Unit Value Set
            (required to http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-energy-unit-vs)
            TypeQuantity(SimpleQuantity)
            [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
            Is Modifierfalse
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            qty-3: If a code for the unit is present, the system SHALL also be present (code.empty() or system.exists())
            sqty-1: The comparator is not used on a SimpleQuantity (comparator.empty())
            12. Extension.value[x]:valueQuantity.id
            Definition

            Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

            ShortUnique id for inter-element referencing
            Control0..1
            Typestring
            Is Modifierfalse
            XML FormatIn the XML format, this property is represented as an attribute.
            Summaryfalse
            14. Extension.value[x]:valueQuantity.extension
            Definition

            May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

            ShortAdditional content defined by implementations
            Comments

            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

            Control0..*
            TypeExtension
            Is Modifierfalse
            Summaryfalse
            Alternate Namesextensions, user content
            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
            ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
            SlicingThis element introduces a set of slices on Extension.value[x].extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
            • value @ url
            • 16. Extension.value[x]:valueQuantity.value
              Definition

              The value of the measured amount. The value includes an implicit precision in the presentation of the value.

              ShortNumerical value (with implicit precision)
              Comments

              The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).

              Control1..1
              Typedecimal
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Precision is handled implicitly in almost all cases of measurement.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              18. Extension.value[x]:valueQuantity.comparator
              Definition

              Not allowed to be used in this context

              Short< | <= | >= | > - how to understand the value
              Control0..0
              BindingThe codes SHALL be taken from QuantityComparator
              (required to http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1)

              How the Quantity should be understood and represented.

              Typecode
              Is Modifiertrue because This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.

              Meaning if MissingIf there is no comparator, then there is no modification of the value
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              20. Extension.value[x]:valueQuantity.unit
              Definition

              A human-readable form of the unit.

              ShortUnit representation
              Control0..1
              Typestring
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              22. Extension.value[x]:valueQuantity.system
              Definition

              The identification of the system that provides the coded form of the unit.

              ShortSystem that defines coded unit form
              Control1..1
              This element is affected by the following invariants: qty-3
              Typeuri
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Need to know the system that defines the coded form of the unit.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              24. Extension.value[x]:valueQuantity.code
              Definition

              A computer processable form of the unit in some unit representation system.

              ShortCoded form of the unit
              Comments

              The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.

              Control1..1
              Typecode
              Is Modifierfalse
              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
              Summarytrue
              Requirements

              Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.

              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
              26. Extension.value[x]:valueCodeableConcept
              Slice NamevalueCodeableConcept
              Definition

              Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

              ShortThe isotope used for radiotherapy.
              Control0..1
              BindingUnless not suitable, these codes SHALL be taken from Radiotherapy Isotope Value Set
              (extensible to http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-isotope-vs)
              TypeCodeableConcept
              [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
              Is Modifierfalse
              Summaryfalse
              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))