{
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "definition" : "A method of determining BAT that involves computing the temporal derivative of the concentration-time curve and selecting the time when the temporal derivative exceeds a specified threshold. See Shpilfoygel Med Phys 2008. doi: 10.1118/1.1288669",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "5f336dd4-db81-5653-939a-25648922f08e",
  "concept_id" : "e7ec16b1-e831-53e3-810f-7924e1e9fe43",
  "ancestors" : {
    "126373" : 0
  },
  "id" : "9628a1bb-b280-41ad-84db-1a9366559507",
  "code" : "126373",
  "display" : "Temporal Derivative Exceeds Threshold",
  "version" : "01"
}