This is the CodeSystem that contains codes in both RadLex radiology lexicon (http://radlex.org) and RadLex radiology lexicon (http://radlex.org).
This code system http://hl7.org/fhir/comparison/CodeSystem/2c77c26f-0eba-4543-89eb-09eda3cba01c-465 defines codes, but no codes are represented here