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 20bc3134-ebe2-4c64-81ac-614a70124787-461
This code system http://hl7.org/fhir/comparison/CodeSystem/20bc3134-ebe2-4c64-81ac-614a70124787-461 defines codes, but no codes are represented here
http://hl7.org/fhir/comparison/CodeSystem/20bc3134-ebe2-4c64-81ac-614a70124787-461