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: Energy or Isotope

Official URL: http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope Version: 2.0.0
Standards status: Trial-use Active as of 2026-01-27 Computable Name: RadiotherapyEnergyOrIsotope
Other Identifiers: OID:2.16.840.1.113883.4.642.40.14.42.13

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

Context of Use

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Radiotherapy Energy or Isotope
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope"
... Slices for value[x] 1..1 Value of extension
Slice: Unordered, Open by type:$this
.... valueCodeableConcept CodeableConcept
.... valueQuantity Quantity(SimpleQuantity)
.... value[x]:valueQuantity 0..1 SimpleQuantity The 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.
Binding: Radiotherapy Energy Unit Value Set (required)
..... value 1..1 decimal Numerical value (with implicit precision)
..... system 1..1 uri System that defines coded unit form
..... code 1..1 code Coded form of the unit
.... value[x]:valueCodeableConcept 0..1 CodeableConcept The isotope used for radiotherapy.
Binding: Radiotherapy Isotope Value Set (extensible)

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Extension.value[x]:valueQuantity Base required Radiotherapy Energy Unit Value Set 📦2.0.0 This IG
Extension.value[x]:valueCodeableConcept Base extensible Radiotherapy Isotope Value Set 📦2.0.0 This IG
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Radiotherapy Energy or Isotope
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope"
.... valueCodeableConcept CodeableConcept
.... valueQuantity Quantity(SimpleQuantity)
.... value[x]:valueQuantity 0..1 SimpleQuantity The 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.
Binding: Radiotherapy Energy Unit Value Set (required)
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... value Σ 1..1 decimal Numerical value (with implicit precision)
..... unit Σ 0..1 string Unit representation
..... system ΣC 1..1 uri System that defines coded unit form
..... code Σ 1..1 code Coded form of the unit
.... value[x]:valueCodeableConcept 0..1 CodeableConcept The isotope used for radiotherapy.
Binding: Radiotherapy Isotope Value Set (extensible)

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.value[x]:valueQuantity Base required Radiotherapy Energy Unit Value Set 📦2.0.0 This IG
Extension.value[x]:valueCodeableConcept Base extensible Radiotherapy Isotope Value Set 📦2.0.0 This IG

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type CodeableConcept, Quantity: The radiation energy used for radiotherapy. The energy spectrum is characterized by the maximum energy, the maximum acceleration voltage, or the used isotope.

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Radiotherapy Energy or Isotope
... extension 0..0 Extension
... url 1..1 uri "http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope"
... Slices for value[x] 1..1 Value of extension
Slice: Unordered, Open by type:$this
.... valueCodeableConcept CodeableConcept
.... valueQuantity Quantity(SimpleQuantity)
.... value[x]:valueQuantity 0..1 SimpleQuantity The 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.
Binding: Radiotherapy Energy Unit Value Set (required)
..... value 1..1 decimal Numerical value (with implicit precision)
..... system 1..1 uri System that defines coded unit form
..... code 1..1 code Coded form of the unit
.... value[x]:valueCodeableConcept 0..1 CodeableConcept The isotope used for radiotherapy.
Binding: Radiotherapy Isotope Value Set (extensible)

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Extension.value[x]:valueQuantity Base required Radiotherapy Energy Unit Value Set 📦2.0.0 This IG
Extension.value[x]:valueCodeableConcept Base extensible Radiotherapy Isotope Value Set 📦2.0.0 This IG

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Radiotherapy Energy or Isotope
... id 0..1 string Unique id for inter-element referencing
... extension 0..0 Extension
Slice: Unordered, Open by value:url
... url 1..1 uri "http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope"
.... valueCodeableConcept CodeableConcept
.... valueQuantity Quantity(SimpleQuantity)
.... value[x]:valueQuantity 0..1 SimpleQuantity The 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.
Binding: Radiotherapy Energy Unit Value Set (required)
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... value Σ 1..1 decimal Numerical value (with implicit precision)
..... unit Σ 0..1 string Unit representation
..... system ΣC 1..1 uri System that defines coded unit form
..... code Σ 1..1 code Coded form of the unit
.... value[x]:valueCodeableConcept 0..1 CodeableConcept The isotope used for radiotherapy.
Binding: Radiotherapy Isotope Value Set (extensible)

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.value[x]:valueQuantity Base required Radiotherapy Energy Unit Value Set 📦2.0.0 This IG
Extension.value[x]:valueCodeableConcept Base extensible Radiotherapy Isotope Value Set 📦2.0.0 This IG

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

Summary

Simple Extension with the type CodeableConcept, Quantity: The radiation energy used for radiotherapy. The energy spectrum is characterized by the maximum energy, the maximum acceleration voltage, or the used isotope.

 

Other representations of profile: CSV, Excel, Schematron