CodeX Radiation Therapy
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This page is part of the CodeX™ Radiation Therapy (v2.0.0-ballot: STU 2 Ballot 1) based on FHIR (HL7® FHIR® Standard) R4. The current version which supersedes this version is 1.0.0. For a full list of available versions, see the Directory of published versions

Representing Radiotherapy Treatment

The following table documents how the 4 Procedure and 6 Service Request profiles defined in this IG capture the key aspects of radiation therapy using fields and extensions. Many of the extensions are incorporated across all 10 profiles, whereas some are selectively incorporated. Links to relevant definitions are provided. Profiles or Extensions that are new in STU2 are marked as New . This table is for the convenience of the reader and should not be used to assess conformance with the IG.

Field or Extension Data Element Component Notes Prescriptions Plans Performed Treatment
Course Prescription
Phase Prescription
Plan Prescription
Planned Course
Planned Phase
Treatment Plan
Course Summary
Treated Phase
Treated Plan
Treated Fraction *New*
E Treatment Intent Treatment Intent The purpose of a treatment, medication, or procedure, as defined in mCODE. x x x
F Reason for Termination Status Reason A code explaining the unplanned or premature termination, or normal completion, of a plan of treatment, course of medication, or research study as defined in mCODE. x
F Treatment Site Body Site Described using TG263 terms mapped to SNOMEDCT codes and qualifiers as defined in mCODE. x x x x x x x x x x
E Treatment Modality and Technique Modality As defined in mCODE. x x x x x x x x x x
Technique As defined in mCODE. x x x x x x x x x x
Energy or Isotope The radiation energy used for radiotherapy. The energy spectrum is characterized by the maximum energy, the maximum accelaration voltage, or the used isotope. x x x x x x x x x x
Treatment Appplicator Type Type of Radiotherapy Treatment Applicator used in Brachytherapy. x x x x x x x x x x
E Fraction Number in Phase Treated Fraction *New* Fraction Number in Phase The fraction number that was treated in the phase. x
E Fraction Number in Plan *New* Fraction Number in Plan The fraction number that was treated in the plan. x
E Actual Number of Sessions Actual Number of Sessions The number of sessions in a course of radiotherapy. x
E Number of Fractions (Prescribed, Planned, or Delivered) Number of Fractions The number of prescribed, planned, or delivered treatment fractions for all volumes in this resources. x x x x x x
E Prescribed, Planned, Delivered Dose Volume Reference to a RadiotherapyVolume as defined in mCODE. x x x x x x x x x x
Total Dose Total physical radiation dose in cGy. x x x x x x x x x x
Dose per Fraction Physical radiations dose per fraction in cGy. x x x x
Fractions Number of Fractions (Prescribed, Planned, or Delivered) for this volume. x x x
Point Dose *New* This flag is true if the dose is determined at a single point. Point doses are often used to check dose at a specific point in a calculated 3D dose distribution. Since point doses mostly have a technical role, high-level summaries may decide to exclude them from displays. x x x x x x x
Primary Plan Dose *New* This flag is true if the dose is the primary plan dose in a radiotherapy treatment plan. For a single treatment plan, the primary plan dose serves as the main dose value for tracking delivered dose vs. planned dose. In summaries over multiple treatment plans, the flag indicates that the dose is a primary plan dose in any of the summarized plans. x x x x x x x
Radiobiologic Metric *New* Radiobiologic dose metric using a regular expression: BED, CGE, RBE, RBE(factor = <decimal>), EQD2Gy, EQD2Gy(a/b = <decimal>), as defined by TG263. x x x x x x x x x x
E Image Guided Radiotherapy Modality *New* Image Guided Radiotherapy Modality The modality and associated energy used for imaging in Image Guided Radiotherapy (IGRT). x x x x x x x x x x
E Reason for Revision or Adaptation The reason a planned or prescribed radiotherapy treatment was revised, superceded, or adapted. x x x x x x
E Respiratory Motion Management *New* Method applied to manage respiratory motion. x x x x x x x x x
E Free Breathing Motion Management Technique *New* Technique to manage respiratory motion with free-breathing. Only allowed if respiratory motion management is free-breathing. x x x x x x x x x x
E Intrafraction Verification *New* Verification of the patient or target position during a treatment fraction. Specified with a procedure and an optional qualifier. x x x x x x x x x x
E DICOM Record *New* Reference to a DICOM SOP instances representing a treatment records such as RT Beams Treatment Record or RT Ion Beams Treatment Record. One or more treatment records are expected from each treatment sessions. x x x