Developing a hybrid dictionary-based bio-entity recognition technique

Min Song, Hwanjo Yu, Wook Shin Han

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


Background: Bio-entity extraction is a pivotal component for information extraction from biomedical literature. The dictionary-based bio-entity extraction is the first generation of Named Entity Recognition (NER) techniques. Methods: This paper presents a hybrid dictionary-based bio-entity extraction technique. The approach expands the bio-entity dictionary by combining different data sources and improves the recall rate through the shortest path edit distance algorithm. In addition, the proposed technique adopts text mining techniques in the merging stage of similar entities such as Part of Speech (POS) expansion, stemming, and the exploitation of the contextual cues to further improve the performance. Results: The experimental results show that the proposed technique achieves the best or at least equivalent performance among compared techniques, GENIA, MESH, UMLS, and combinations of these three resources in F-measure. Conclusions: The results imply that the performance of dictionary-based extraction techniques is largely influenced by information resources used to build the dictionary. In addition, the edit distance algorithm shows steady performance with three different dictionaries in precision whereas the context-only technique achieves a high-end performance with three difference dictionaries in recall.

Original languageEnglish
Article numberS9
JournalBMC Medical Informatics and Decision Making
Issue number1
Publication statusPublished - 2015 May 20

Bibliographical note

Publisher Copyright:
© 2015 Song et al.; licensee BioMed Central Ltd.

All Science Journal Classification (ASJC) codes

  • Health Policy
  • Health Informatics


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