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Abstract Objective: Develop a representational schema for clinical concepts and apply it to the task of encoding radiology reports of the chest. Design: The schema was developed following a manual analysis of sample reports from the domain. The schema has two main components: the Medical Entities Dictionary (MED), which specifies the formal representation of the concepts in the domain and of their structures, and the natural-language processor, which specifies the linguistic expressions of the concepts. The schema was evaluated by applying it to a test set of 7,500 reports. Two-hundred reports from the test set were manually analyzed by a medical expert to determine the accuracy and success rate of the system. Results: 82% of the 7,500 reports that contained relevant clinical information were successfully structured automatically. For the smaller set of 200 reports, 80% were structured successfully with an accuracy rate of 97%. Conclusions: The schema is a formal representation for clinical concepts in radiology reports, and provides domain coverage that is particularly well-suited for natural-language processing of radiology for use in a decision support system. This content is only available as a PDF. Author notes Supported in part by grant R29 LM05397 from the National Library of Medicine, by grant 6-61383 from the Research Foundation of CUNY, by a Unified Medical Language System grant from the National Library of Medicine, and by a development contract with IBM Corporation. American Medical Informatics Association
Journal of the American Medical Informatics Association – Oxford University Press
Published: May 1, 1994
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