title: A schema for representing medical language applied to clinical radiology.
abstract: OBJECTIVE
  Develop a representational schema for clinical concepts and apply it to the task of encoding radiology reports of the chest.
  
  
  METHODS
  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.
authors.affiliation: Queens College of the City of New York, NY, USA.
authors.forename: C
authors.initials: C
authors.lastname: Friedman
authors.forename: J J
authors.initials: JJ
authors.lastname: Cimino
authors.forename: S B
authors.initials: SB
authors.lastname: Johnson
mesh_terms: D003660:Decision Support Systems, Management; D005069:Evaluation Studies as Topic; D009323:Natural Language Processing; D011871:Radiology; D013358:Subject Headings; D009626:Terminology as Topic