RadiationTherapy

Radiation therapy (or radiotherapy) uses ionizing radiation, generally as part of cancer treatment to control or kill malignant cells.

Data model

Definition of the Radiotherapy element

Field	Type	Multiplicity	Description
modality	OntologyClass	1..1	The modality of radiation therapy (e.g., electron, photon,…). REQUIRED.
body_site	OntologyClass	1..1	The anatomical site where radiation therapy was administered. REQUIRED.
dosage	int32	1..1	the total dose given in units of Gray (Gy). REQUIRED.
fractions	int32	1..1	The total number of fractions delivered as part of treatment. REQUIRED.

Explanations

modality

Terms from the NCIT can be used to represent the modality of radiation therapy. Four examples are shown here:

• Electron Beam (NCIT:C28039)

• Proton Radiation (NCIT:C40431).

• Photon Beam Radiation Therapy (NCIT:C104914)

• High-LET Heavy Ion Therapy (NCIT:C15458).

The NCIT terms themselves specify whether the radiation therapy was administered externally or internally. For instance, NCIT terms from the Internal Radiation Therapy (NCIT:C15195) subhierarchy would be used to indicate a type of internal radiation therapy.

body_site

The anatomical site that was irradiated. An uberon term can be used.

dosage

The total dosage administered, indicated in units of Gray.

fractions

The number of fractions into which the radiation dosage was divided.