What is the discrete set of modifiers related to a radiotherapy event?

[kzollove]

Factors

• Type
• Phase / course
• Technique
• Site
• Modality
• Intent
• Fractions
• Dose/Volume
• Planned vs. Delivered
• Start date and end date (if procedures)
• Others?

Proposed Solutions

We need to identify what level of granularity the actual "procedure" of the radiotherapy will be and consequently what modifiers will be needed to fully represent the relevant details.

Assuming we want to have the standard target concept (procedure domain) be more specific than "radiotherapy" with a bunch of modifiers, is there a hierarchy of procedures that we can leverage?

One suggestion has been to reference the "Astro Minimum Data Elements for Radiation Oncology". An article on this can be found here: https://www.practicalradonc.org/article/S1879-8500(19)30232-2/fulltext

Another factor is that all of the above is referencing data sources that contain detailed radiotherapy data but we also need to account for the more generic radiotherapy procedures which lack this detail, e.g. from billing codes alone, and how we can accommodate both types in a similar manner to enable straightforward phenotyping.

[RKWPNW]

Saw this in the Oncology work group. We have some structured radiotherapy data coming from the EMR that we might be interested in mapping to these standards.