{
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "definition" : "The background value (VOI2-VOI1) used to calculate Standardized Added Metabolic Activity (SAM). SAM is calculated by drawing a volume of interest (VOI1) around the tumour and a larger VOI (VOI2) around VOI1. Subtracting the background activity in VOI2-VOI1 from VOI1 yields SAM. See Mertens et al. \\\"Standardized added metabolic activity (SAM): a partial volume independent marker of total lesion glycolysis in liver metastases\\\". Eur J Nucl Med Mol Imaging (2012) 39:1441-1448",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "5f336dd4-db81-5653-939a-25648922f08e",
  "concept_id" : "965c396d-b45c-5204-949c-ebadb3f284a4",
  "ancestors" : {
    "126038" : 0
  },
  "id" : "cada0d43-b131-4383-94bd-324c60620795",
  "code" : "126038",
  "display" : "Standardized Added Metabolic Activity (SAM) Background",
  "version" : "01"
}