Using SNOMED CT with the UMLS - Medical Ontology Research
Using SNOMED CT with the UMLS - Medical Ontology Research
Using SNOMED CT with the UMLS - Medical Ontology Research
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MetaMap<br />
• Developed by NLM<br />
http://metamap.nlm.nih.gov/<br />
• To map biomedical text to <strong>UMLS</strong> concepts<br />
• Target can be restricted to specific vocabularies<br />
• Mapping algorithm<br />
◦ parsing – noun phrases identified<br />
◦ variant generation<br />
◦ candidate retrieval – retrieve all Meta<strong>the</strong>saurus strings<br />
containing at least one of <strong>the</strong> variants<br />
◦ candidate evaluation – based on centrality, variation, coverage<br />
and cohesiveness<br />
◦ mapping construction – complete mappings constructed by<br />
combining candidates
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