This is the CodeSystem that contains all the codes in RadLex radiology lexicon (http://radlex.org) and RadLex radiology lexicon (http://radlex.org). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 9137e97b-aec1-4316-a65f-a273ef42c951-464
This code system http://hl7.org/fhir/comparison/CodeSystem/9137e97b-aec1-4316-a65f-a273ef42c951-464 defines codes, but no codes are represented here
http://hl7.org/fhir/comparison/CodeSystem/9137e97b-aec1-4316-a65f-a273ef42c951-464