@inproceedings{kalyan-sangeetha-2020-social,
    title = "Social Media Medical Concept Normalization using {R}o{BERT}a in Ontology Enriched Text Similarity Framework",
    author = "Kalyan, Katikapalli Subramanyam  and
      Sangeetha, Sivanesan",
    editor = "Shalom, Oren Sar  and
      Panchenko, Alexander  and
      dos Santos, Cicero  and
      Logacheva, Varvara  and
      Moschitti, Alessandro  and
      Dagan, Ido",
    booktitle = "Proceedings of Knowledgeable NLP: the First Workshop on Integrating Structured Knowledge and Neural Networks for NLP",
    month = dec,
    year = "2020",
    address = "Suzhou, China",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/ingest-emnlp/2020.knlp-1.3/",
    doi = "10.18653/v1/2020.knlp-1.3",
    pages = "21--26",
    abstract = "Pattisapu et al. (2020) formulate medical concept normalization (MCN) as text similarity problem and propose a model based on RoBERTa and graph embedding based target concept vectors. However, graph embedding techniques ignore valuable information available in the clinical ontology like concept description and synonyms. In this work, we enhance the model of Pattisapu et al. (2020) with two novel changes. First, we use retrofitted target concept vectors instead of graph embedding based vectors. It is the first work to leverage both concept description and synonyms to represent concepts in the form of retrofitted target concept vectors in text similarity framework based social media MCN. Second, we generate both concept and concept mention vectors with same size which eliminates the need of dense layers to project concept mention vectors into the target concept embedding space. Our model outperforms existing methods with improvements up to 3.75{\%} on two standard datasets. Further when trained only on mapping lexicon synonyms, our model outperforms existing methods with significant improvements up to 14.61{\%}. We attribute these significant improvements to the two novel changes introduced."
}