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- Title
Extracting entities with attributes in clinical text via joint deep learning.
- Authors
Shi, Xue; Yi, Yingping; Xiong, Ying; Tang, Buzhou; Chen, Qingcai; Wang, Xiaolong; Ji, Zongcheng; Zhang, Yaoyun; Xu, Hua
- Abstract
<bold>Objective: </bold>Extracting clinical entities and their attributes is a fundamental task of natural language processing (NLP) in the medical domain. This task is typically recognized as 2 sequential subtasks in a pipeline, clinical entity or attribute recognition followed by entity-attribute relation extraction. One problem of pipeline methods is that errors from entity recognition are unavoidably passed to relation extraction. We propose a novel joint deep learning method to recognize clinical entities or attributes and extract entity-attribute relations simultaneously.<bold>Materials and Methods: </bold>The proposed method integrates 2 state-of-the-art methods for named entity recognition and relation extraction, namely bidirectional long short-term memory with conditional random field and bidirectional long short-term memory, into a unified framework. In this method, relation constraints between clinical entities and attributes and weights of the 2 subtasks are also considered simultaneously. We compare the method with other related methods (ie, pipeline methods and other joint deep learning methods) on an existing English corpus from SemEval-2015 and a newly developed Chinese corpus.<bold>Results: </bold>Our proposed method achieves the best F1 of 74.46% on entity recognition and the best F1 of 50.21% on relation extraction on the English corpus, and 89.32% and 88.13% on the Chinese corpora, respectively, which outperform the other methods on both tasks.<bold>Conclusions: </bold>The joint deep learning-based method could improve both entity recognition and relation extraction from clinical text in both English and Chinese, indicating that the approach is promising.
- Subjects
NATURAL language processing; DEEP learning; SHORT-term memory; RANDOM fields
- Publication
Journal of the American Medical Informatics Association, 2019, Vol 26, Issue 12, p1584
- ISSN
1067-5027
- Publication type
journal article
- DOI
10.1093/jamia/ocz158