HL7 Europe Common Cancer Model
1.0.0-ballot - ballot 150

HL7 Europe Common Cancer Model - Local Development build (v1.0.0-ballot) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

## Logical Model: Radiotherapy - Detailed Descriptions

Active as of 2026-06-14

Definitions for the Radiotherapy logical model.

- Key Elements Table
- Differential Elements Table
- Snapshot Elements Table

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

0. Radiotherapy
Definition | Logical model representing a radiotherapy treatment course administered to the patient, including intent, timing, and anatomical target. Derived from Cancer_Common_Logical_Model_20260521.xlsx (sheet Radiotherapy).
Short | Radiotherapy
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
Invariants | rt-1: If endDate is present, it should be greater than or equal to startDate. (`endDate.empty() or endDate >= startDate`)
2. Radiotherapy.subject
Definition | Reference to the patient (subject) receiving radiotherapy.
Short | Subject
Control | 1..1
Type | Reference(Cancer Patient)
4. Radiotherapy.cancerConditionAtDiagnosisReference
Definition | Reference to the cancer condition at diagnosis targeted by radiotherapy.
Short | CancerCondition AtDiagnosis Reference
Control | 1..1
Type | Reference(CancerConditionAtDiagnosis)
6. Radiotherapy.clinicalCancerProgressionReference
Definition | Reference to the clinical progression event, if radiotherapy is delivered in response to progression.
Short | ClinicalCancerProgresionReference
Comments | It is not only required at the time of diagnosis; it must be provided in the event of ClinicalCancerProgression.
Control | 0..1
Type | Reference(ClinicalCancerProgression)
8. Radiotherapy.intent
Definition | Radiotherapy intent (Definitive/curative vs Palliative).
Short | Intent
Comments | Choice: Definitive | Palliative
Control | 1..1
Type | CodeableConcept
10. Radiotherapy.startDate
Definition | Start date of the radiotherapy course.
Short | StartDate
Control | 1..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
12. Radiotherapy.endDate
Definition | End date of the radiotherapy course (may be missing while ongoing).
Short | EndDate
Comments | It might not be available while the radiotherapy is still ongoing; however, an end date must eventually be recorded, which in the most extreme case will coincide with the patient's date of death.
Control | 0..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
14. Radiotherapy.bodySite
Definition | Anatomical site(s) targeted by radiotherapy.
Short | BodySite
Control | 1..*
Type | CodeableConcept
16. Radiotherapy.setting
Definition | Strategic timing/setting of radiotherapy (e.g. neoadjuvant, adjuvant, concomitant, alone).
Short | Setting
Comments | Choice: Alone | Preoperative/Neoadjuvant | Postoperative/Adjuvant | Concomitant
Control | 0..1
Type | CodeableConcept

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

0. Radiotherapy
Definition | Logical model representing a radiotherapy treatment course administered to the patient, including intent, timing, and anatomical target. Derived from Cancer_Common_Logical_Model_20260521.xlsx (sheet Radiotherapy).
Short | Radiotherapy
Logical Model | Instances of this logical model are not marked to be the target of a Reference
Invariants | rt-1: If endDate is present, it should be greater than or equal to startDate. (`endDate.empty() or endDate >= startDate`)
2. Radiotherapy.subject
Definition | Reference to the patient (subject) receiving radiotherapy.
Short | Subject
Control | 1..1
Type | Reference(Cancer Patient)
4. Radiotherapy.cancerConditionAtDiagnosisReference
Definition | Reference to the cancer condition at diagnosis targeted by radiotherapy.
Short | CancerCondition AtDiagnosis Reference
Control | 1..1
Type | Reference(CancerConditionAtDiagnosis)
6. Radiotherapy.clinicalCancerProgressionReference
Definition | Reference to the clinical progression event, if radiotherapy is delivered in response to progression.
Short | ClinicalCancerProgresionReference
Comments | It is not only required at the time of diagnosis; it must be provided in the event of ClinicalCancerProgression.
Control | 0..1
Type | Reference(ClinicalCancerProgression)
8. Radiotherapy.intent
Definition | Radiotherapy intent (Definitive/curative vs Palliative).
Short | Intent
Comments | Choice: Definitive | Palliative
Control | 1..1
Type | CodeableConcept
10. Radiotherapy.startDate
Definition | Start date of the radiotherapy course.
Short | StartDate
Control | 1..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
12. Radiotherapy.endDate
Definition | End date of the radiotherapy course (may be missing while ongoing).
Short | EndDate
Comments | It might not be available while the radiotherapy is still ongoing; however, an end date must eventually be recorded, which in the most extreme case will coincide with the patient's date of death.
Control | 0..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
14. Radiotherapy.bodySite
Definition | Anatomical site(s) targeted by radiotherapy.
Short | BodySite
Control | 1..*
Type | CodeableConcept
16. Radiotherapy.setting
Definition | Strategic timing/setting of radiotherapy (e.g. neoadjuvant, adjuvant, concomitant, alone).
Short | Setting
Comments | Choice: Alone | Preoperative/Neoadjuvant | Postoperative/Adjuvant | Concomitant
Control | 0..1
Type | CodeableConcept

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

0. Radiotherapy
Definition | Logical model representing a radiotherapy treatment course administered to the patient, including intent, timing, and anatomical target. Derived from Cancer_Common_Logical_Model_20260521.xlsx (sheet Radiotherapy).
Short | Radiotherapy
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
Invariants | rt-1: If endDate is present, it should be greater than or equal to startDate. (`endDate.empty() or endDate >= startDate`)
2. Radiotherapy.subject
Definition | Reference to the patient (subject) receiving radiotherapy.
Short | Subject
Control | 1..1
Type | Reference(Cancer Patient)
4. Radiotherapy.cancerConditionAtDiagnosisReference
Definition | Reference to the cancer condition at diagnosis targeted by radiotherapy.
Short | CancerCondition AtDiagnosis Reference
Control | 1..1
Type | Reference(CancerConditionAtDiagnosis)
6. Radiotherapy.clinicalCancerProgressionReference
Definition | Reference to the clinical progression event, if radiotherapy is delivered in response to progression.
Short | ClinicalCancerProgresionReference
Comments | It is not only required at the time of diagnosis; it must be provided in the event of ClinicalCancerProgression.
Control | 0..1
Type | Reference(ClinicalCancerProgression)
8. Radiotherapy.intent
Definition | Radiotherapy intent (Definitive/curative vs Palliative).
Short | Intent
Comments | Choice: Definitive | Palliative
Control | 1..1
Type | CodeableConcept
10. Radiotherapy.startDate
Definition | Start date of the radiotherapy course.
Short | StartDate
Control | 1..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
12. Radiotherapy.endDate
Definition | End date of the radiotherapy course (may be missing while ongoing).
Short | EndDate
Comments | It might not be available while the radiotherapy is still ongoing; however, an end date must eventually be recorded, which in the most extreme case will coincide with the patient's date of death.
Control | 0..1
Type | dateTime
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
14. Radiotherapy.bodySite
Definition | Anatomical site(s) targeted by radiotherapy.
Short | BodySite
Control | 1..*
Type | CodeableConcept
16. Radiotherapy.setting
Definition | Strategic timing/setting of radiotherapy (e.g. neoadjuvant, adjuvant, concomitant, alone).
Short | Setting
Comments | Choice: Alone | Preoperative/Neoadjuvant | Postoperative/Adjuvant | Concomitant
Control | 0..1
Type | CodeableConcept