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FHIR IG Statistics: StructureDefinition/codexrt-radiotherapy-energy-or-isotope

Packagehl7.fhir.us.codex-radiation-therapy
TypeStructureDefinition
Idcodexrt-radiotherapy-energy-or-isotope
FHIR VersionR4
Sourcehttp://hl7.org/fhir/us/codex-radiation-therapy/https://build.fhir.org/ig/HL7/codex-radiation-therapy/StructureDefinition-codexrt-radiotherapy-energy-or-isotope.html
URLhttp://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope
Version2.0.0
Statusactive
Date2025-02-17T17:31:36+00:00
NameRadiotherapyEnergyOrIsotope
TitleEnergy or Isotope
Realmus
Authorityhl7
DescriptionThe radiation energy used for radiotherapy. The energy spectrum is characterized by the maximum energy, the maximum acceleration voltage, or the used isotope.
TypeExtension
Kindcomplex-type

Resources that use this resource

StructureDefinition
codexrt-radiotherapy-course-prescriptionRadiotherapy Course Prescription
codexrt-radiotherapy-course-summaryRadiotherapy Course Summary
codexrt-radiotherapy-phase-prescriptionRadiotherapy Phase Prescription
codexrt-radiotherapy-plan-prescriptionRadiotherapy Plan Prescription
codexrt-radiotherapy-planned-courseRadiotherapy Planned Course
codexrt-radiotherapy-planned-phaseRadiotherapy Planned Phase
codexrt-radiotherapy-treated-fractionRadiotherapy Treated Fraction
codexrt-radiotherapy-treated-phaseRadiotherapy Treated Phase
codexrt-radiotherapy-treated-planRadiotherapy Treated Plan
codexrt-radiotherapy-treatment-planRadiotherapy Treatment Plan

Resources that this resource uses

ValueSet
codexrt-radiotherapy-energy-unit-vsRadiotherapy Energy Unit Value Set
codexrt-radiotherapy-isotope-vsRadiotherapy Isotope Value Set

Narrative

Note: links and images are rebased to the (stated) source

Generated Narrative: StructureDefinition codexrt-radiotherapy-energy-or-isotope

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..*ExtensionRadiotherapy Energy or Isotope
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope"
... Slices for value[x] 1..1Value of extension
Slice: Unordered, Open by type:$this
.... valueCodeableConceptCodeableConcept
.... valueQuantityQuantity(SimpleQuantity)
.... value[x]:valueQuantity 0..1SimpleQuantityThe 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..1decimalNumerical value (with implicit precision)
..... system 1..1uriSystem that defines coded unit form
..... code 1..1codeCoded form of the unit
.... value[x]:valueCodeableConcept 0..1CodeableConceptThe isotope used for radiotherapy.
Binding: Radiotherapy Isotope Value Set (extensible)

doco Documentation for this format

Source

{
  "resourceType": "StructureDefinition",
  "id": "codexrt-radiotherapy-energy-or-isotope",
  "text": {
    "status": "extensions",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "cgp"
    }
  ],
  "url": "http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope",
  "identifier": [
    {
      "system": "urn:ietf:rfc:3986",
      "value": "urn:oid:2.16.840.1.113883.4.642.40.14.42.13"
    }
  ],
  "version": "2.0.0",
  "name": "RadiotherapyEnergyOrIsotope",
  "title": "Energy or Isotope",
  "status": "active",
  "date": "2025-02-17T17:31:36+00:00",
  "publisher": "HL7 International / Cross-Group Projects",
  "contact": [
    {
      "name": "HL7 International / Cross-Group Projects",
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/cgp"
        },
        {
          "system": "email",
          "value": "cgplist@lists.HL7.org"
        }
      ]
    }
  ],
  "description": "The radiation energy used for radiotherapy. The energy spectrum is characterized\nby the maximum energy, the maximum acceleration voltage, or the used isotope.",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "urn:iso:std:iso:3166",
          "code": "US",
          "display": "United States of America"
        }
      ]
    }
  ],
  "fhirVersion": "4.0.1",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Procedure"
    },
    {
      "type": "element",
      "expression": "ServiceRequest"
    },
    {
      "type": "element",
      "expression": "ActivityDefinition"
    },
    {
      "type": "element",
      "expression": "Device"
    },
    {
      "type": "extension",
      "expression": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "extension": [
      {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
        "valueString": "4.0.1"
      }
    ],
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Radiotherapy Energy or Isotope",
        "definition": "The radiation energy used for radiotherapy. The energy spectrum is characterized\nby the maximum energy, the maximum acceleration voltage, or the used isotope.",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "isModifier": false
      },
      {
        "id": "Extension.id",
        "path": "Extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "string"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Extension",
        "definition": "An Extension",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "isModifier": false,
        "isSummary": false
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a URL.",
        "comment": "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.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "uri"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "slicing": {
          "discriminator": [
            {
              "type": "type",
              "path": "$this"
            }
          ],
          "ordered": false,
          "rules": "closed"
        },
        "short": "Value of extension",
        "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          },
          {
            "code": "Quantity",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/SimpleQuantity"
            ]
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity",
        "path": "Extension.value[x]",
        "sliceName": "valueQuantity",
        "short": "The spectrum of radiation energy characterized by a maximum value.\nFor 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.",
        "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Quantity",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/SimpleQuantity"
            ]
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "binding": {
          "strength": "required",
          "valueSet": "http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-energy-unit-vs"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity.id",
        "path": "Extension.value[x].id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "string"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity.extension",
        "path": "Extension.value[x].extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional content defined by implementations",
        "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.",
        "comment": "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.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity.value",
        "path": "Extension.value[x].value",
        "short": "Numerical value (with implicit precision)",
        "definition": "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
        "comment": "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).",
        "requirements": "Precision is handled implicitly in almost all cases of measurement.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Quantity.value",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "decimal"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": true,
        "mapping": [
          {
            "identity": "v2",
            "map": "SN.2  / CQ - N/A"
          },
          {
            "identity": "rim",
            "map": "PQ.value, CO.value, MO.value, IVL.high or IVL.low depending on the value"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity.comparator",
        "path": "Extension.value[x].comparator",
        "short": "< | <= | >= | > - how to understand the value",
        "definition": "Not allowed to be used in this context",
        "requirements": "Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Quantity.comparator",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "meaningWhenMissing": "If there is no comparator, then there is no modification of the value",
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": true,
        "isModifierReason": "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",
        "isSummary": true,
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "QuantityComparator"
            }
          ],
          "strength": "required",
          "description": "How the Quantity should be understood and represented.",
          "valueSet": "http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1"
        },
        "mapping": [
          {
            "identity": "v2",
            "map": "SN.1  / CQ.1"
          },
          {
            "identity": "rim",
            "map": "IVL properties"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity.unit",
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
            "valueBoolean": true
          }
        ],
        "path": "Extension.value[x].unit",
        "short": "Unit representation",
        "definition": "A human-readable form of the unit.",
        "requirements": "There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Quantity.unit",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": true,
        "mapping": [
          {
            "identity": "v2",
            "map": "(see OBX.6 etc.) / CQ.2"
          },
          {
            "identity": "rim",
            "map": "PQ.unit"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity.system",
        "path": "Extension.value[x].system",
        "short": "System that defines coded unit form",
        "definition": "The identification of the system that provides the coded form of the unit.",
        "requirements": "Need to know the system that defines the coded form of the unit.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Quantity.system",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "condition": [
          "qty-3"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": true,
        "mapping": [
          {
            "identity": "v2",
            "map": "(see OBX.6 etc.) / CQ.2"
          },
          {
            "identity": "rim",
            "map": "CO.codeSystem, PQ.translation.codeSystem"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity.code",
        "path": "Extension.value[x].code",
        "short": "Coded form of the unit",
        "definition": "A computer processable form of the unit in some unit representation system.",
        "comment": "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.",
        "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.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Quantity.code",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": true,
        "mapping": [
          {
            "identity": "v2",
            "map": "(see OBX.6 etc.) / CQ.2"
          },
          {
            "identity": "rim",
            "map": "PQ.code, MO.currency, PQ.translation.code"
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueCodeableConcept",
        "path": "Extension.value[x]",
        "sliceName": "valueCodeableConcept",
        "short": "The isotope used for radiotherapy.",
        "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "binding": {
          "strength": "extensible",
          "valueSet": "http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-isotope-vs"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Radiotherapy Energy or Isotope",
        "definition": "The radiation energy used for radiotherapy. The energy spectrum is characterized\nby the maximum energy, the maximum acceleration voltage, or the used isotope."
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://hl7.org/fhir/us/codex-radiation-therapy/StructureDefinition/codexrt-radiotherapy-energy-or-isotope"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "slicing": {
          "discriminator": [
            {
              "type": "type",
              "path": "$this"
            }
          ],
          "ordered": false,
          "rules": "open"
        },
        "min": 1,
        "type": [
          {
            "code": "CodeableConcept"
          },
          {
            "code": "Quantity",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/SimpleQuantity"
            ]
          }
        ]
      },
      {
        "id": "Extension.value[x]:valueQuantity",
        "path": "Extension.value[x]",
        "sliceName": "valueQuantity",
        "short": "The spectrum of radiation energy characterized by a maximum value.\nFor 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.",
        "min": 0,
        "max": "1",
        "type": [
          {
            "code": "Quantity",
            "profile": [
              "http://hl7.org/fhir/StructureDefinition/SimpleQuantity"
            ]
          }
        ],
        "binding": {
          "strength": "required",
          "valueSet": "http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-energy-unit-vs"
        }
      },
      {
        "id": "Extension.value[x]:valueQuantity.value",
        "path": "Extension.value[x].value",
        "min": 1
      },
      {
        "id": "Extension.value[x]:valueQuantity.system",
        "path": "Extension.value[x].system",
        "min": 1
      },
      {
        "id": "Extension.value[x]:valueQuantity.code",
        "path": "Extension.value[x].code",
        "min": 1
      },
      {
        "id": "Extension.value[x]:valueCodeableConcept",
        "path": "Extension.value[x]",
        "sliceName": "valueCodeableConcept",
        "short": "The isotope used for radiotherapy.",
        "min": 0,
        "max": "1",
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "binding": {
          "strength": "extensible",
          "valueSet": "http://hl7.org/fhir/us/codex-radiation-therapy/ValueSet/codexrt-radiotherapy-isotope-vs"
        }
      }
    ]
  }
}