{
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "definition" : "A quantitative numerical statement of the relative attenuation of the X-Ray beam at a specified point. Coefficient that describes the fraction of a beam of X-Rays or gamma rays that is absorbed or scattered per unit thickness of the absorber. This value basically accounts for the number of atoms in a cubic cm volume of material and the probability of a photon being scattered or absorbed from the nucleus or an electron of one of these atoms. Usually expressed in Hounsfield units [referred to as CT Number in Fraser and Pare]",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "5f336dd4-db81-5653-939a-25648922f08e",
  "concept_id" : "703eba83-df12-5afc-bd44-d59d925d77d3",
  "ancestors" : {
    "112031" : 0
  },
  "id" : "998e05f9-2f5a-4c30-a95c-b1c068bb7a1b",
  "code" : "112031",
  "display" : "Attenuation Coefficient",
  "version" : "01"
}