RadLex ID (RID)

The identifier form used by RadLex concepts: the letters RID followed by digits, for example RID1301 for lung or RID50149 for pulmonary nodule. RIDs are the primary key of OIDM anatomic locations: the curated data file keys every record on radlexId, and the newer package keys every location on id holding the same value.¹²

Downstream structures carry the RID directly. An Exam Finding List finding’s optional anatomicLocation is a pair of locationId and locationDisplay, where the identifier is an RID from the anatomic-locations package.³

Synonyms and near-synonyms

• RID is the usual short form, and “RadLex ID” the long one.
• radlexId and locationId are field names holding one.
• RPID is a different scheme, the legacy RadLex Playbook identifier for procedures rather than concepts.
• acrCommonId is a parallel cross-reference on the same records, not an RID.

Identifier form

RID\d+ for a plain concept. Sided variants in the original curated set use a composite form matching ^RID\d+(_RID\d+)*$, joining the base structure’s RID to a laterality concept’s RID, for example RID294_RID5824.¹ The composite form is an OIDM curation convention and is not itself a RadLex identifier.

Where it is used

Data model, Ontologies used, and Exam Finding List.

Conflicts

RadLex marks superseded concepts with a Replaced_by annotation, so a stored RID can become obsolete without the storing system knowing.⁴ Nothing in the OIDM data structures records which RadLex version an identifier was resolved against.

Footnotes

1. body_parts_schema.json ↩ ↩²

2. AnatomicLocation id field ↩

3. imaging-problem-list domain model, dev branch ↩

4. RadLex baseline verification ↩