title: A grammar-based classification of negations in clinical radiology reports.
abstract: We describe the development of a classification scheme of negations based on syntactical categories of negative words, and patterns of negation. Each category contains a negative word or phrase and a pattern to locate negated terms. The classification was derived through literature study and manual inspection of 500 radiology reports of six common imaging modalities.
authors.affiliation: Stanford Medical Informatics and the Stanford Center for Clinical Informatics, Stanford University Schools of Medicine, CA, USA.
authors.forename: Yang
authors.initials: Y
authors.lastname: Huang
authors.forename: Henry J
authors.initials: HJ
authors.lastname: Lowe
mesh_terms: D000043:Abstracting and Indexing; D008037:Linguistics; D008499:Medical Records / Q000145:classification*; D009323:Natural Language Processing; D011871:Radiology / Q000145:classification*; D017432:Unified Medical Language System