A temporal constraint structure for extracting temporal information from clinical narrative
Journal of Biomedical Informatics
Temporal annotation of clinical text
BioNLP '08 Proceedings of the Workshop on Current Trends in Biomedical Natural Language Processing
SemEval-2010 task 13: TempEval-2
SemEval '10 Proceedings of the 5th International Workshop on Semantic Evaluation
BioNLP '11 Proceedings of BioNLP 2011 Workshop
A workbench for temporal event information extraction from patient records
AIMSA'12 Proceedings of the 15th international conference on Artificial Intelligence: methodology, systems, and applications
Extracting and normalizing temporal expressions in clinical data requests from researchers
ICSH'13 Proceedings of the 2013 international conference on Smart Health
Methodological Review: Annotating temporal information in clinical narratives
Journal of Biomedical Informatics
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Clinical reports often include descriptions of events in the patient's medical history, as well as explicit or implicit temporal information about these events. We are working towards applying deep Natural Language Processing tools towards understanding such narratives. This requires both the extraction and classification of the relevant events, and the placing of those events in time, or at least in relation to one another. Although several corpora of news data exist that have been annotated using the TimeML schema, similar corpora of clinical reports are not readily available. In this paper we report on the design of a small corpus and the annotation schema we developed, based on data from the fourth i2b2/VA challenge. These data include, among others, annotations for medical problems, tests, and treatments in clinical reports from several healthcare institutions. We have selected a subset of clinical reports and added annotations similar to those used in the TempEval tasks for the annotation of events, time expressions and temporal relations for the news domain. The annotations have been made freely available to the research community.