description: Extension capturing a modality of external beam or brachytherapy radiation procedures.
package_name: hl7.fhir.us.mcode
derivation: constraint
name: RadiotherapyModality
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality'}
    index: 1
  value:
    choices: [valueCodeableConcept]
    index: 3
  valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4}
package_version: 3.0.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 3.0.0-ballot
required: [value, valueCodeableConcept]