RadElement

The ACR and RSNA registry that publishes CDE sets and CDE elements, at radelement.org.¹ It is both the place definitions are published and the coding system their identifiers belong to: FHIR encodings in the OIDM lineage use https://radelement.org as the coding system alongside an RDES or RDE code.²

RadElement is downstream of authoring. Informal definitions are drafted in CDEStaging, harmonized, and submitted; published sets are mirrored back into the common_data_elements repository “as stored and maintained in the ACR/RSNA RadElement web site.”²

Synonyms and near-synonyms

• CDE names the programme and its definitions. RadElement names the registry and the coding system.
• ACR/RSNA Common Data Elements Project is the organization name behind it, registered in finding model content under the organization code CDE.
• RADELEMENT is the system string used in a finding model index code, as distinct from the URL form used in FHIR.

Identifier form

RDES### for sets and RDE#### for elements, with dot-suffixed value codes.

Where it is used

CDEs and RadElement and Ontologies used.

Conflicts

There is no settled coding-system URI for RadElement codes. IHE IDR asks the question directly, “What is the Coding System identifier for Radelement codes?”, and the next-generation work records it as open.³ In practice three forms are in use: https://radelement.org in FHIR samples, RADELEMENT as an index code system string, and a proposed RDE2 base in the next-generation notes. Separately, RadElement coverage was found missing from ontology search during metadata enrichment, which made index_codes the weakest-scoring field in that pipeline.⁴

Footnotes

1. RadElement registry ↩

2. common_data_elements repository README ↩ ↩²

3. IHE IDR Phase II extract ↩

4. Index code target fixture integration ↩