WANG Weixiao, FEI Xiaolu, LYU Hairong, WEI Lan, TAO Kun, ZHAO Ming, FU Xu, ZHAO Xupan, GAO Fei, REN Yi.
Objective To explore the method of high-precision information extraction and structured processing of electronic medical record by adopting natural language processing, structured algorithm and knowledge graph. Methods By constructing named entity recognition model, relation recognition model and synonym recognition model, the in-sentence information was extracted from medical record. A medical record spanning tree algorithm was proposed, which can effectively analyze the hierarchical structure of large paragraph medical record text. At the same time, knowledge graph technology was used to store the construction models of information extraction and hierarchical analysis to realize high-precision extraction of medical record text information. Results A set of high-precision medical record extraction methods integrated with deep learning algorithm and structural analysis algorithm were formed, in which the accuracy of entity recognition model was 95.74%, and the accuracy of relationship recognition model was 89.20%. Finally, a structured medical record with clear hierarchical structure was generated, which can accurately locate and extract information. Conclusion The high-precision extraction method of medical record information explored in this paper integrates deep learning algorithm with structured analysis algorithm, takes into account the information extraction in sentences of medical record text and the analysis of medical record structure level, which can realize the automatic extraction, precise positioning and efficient management of medical record data, lay the data foundation for clinical medical research and also provide methodological reference for the mining of medical record text data of other diseases.