description: The radiation energy used for radiotherapy. The energy spectrum is characterized\nby the maximum energy, the maximum accelaration voltage, or the used isotope.
package_name: hl7.fhir.us.codex
derivation: constraint
name: RadiotherapyEnergyOrIsotope
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope'}
    index: 1
  value:
    choices: [valueCodeableConcept, valueQuantity]
    index: 3
  valueCodeableConcept:
    type: CodeableConcept
    short: The isotope used for radiotherapy.
    binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codex-radiotherapy-isotopes'}
    index: 7
  valueQuantity: {type: Quantity, choiceOf: value, index: 5}
package_version: radiation-therapy-1.0.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 1.0.0-ballot
required: [value, valueCodeableConcept, valueQuantity]