To diagnose and treat patients, clinicians concern themselves with a complex set
of events. They need to know when, how long, and in what sequence certain events
occur. An automated means of extracting temporal meaning in electronic medical
records has been particularly challenging in natural language processing. Currently the
Tarsqi Toolkit (TTK) is the only complete software package (open source) freely
available for the temporal ordering of events within narrative free text documents. This
project focused on the TTKs ability to recognize temporal expressions within Veterans
Affairs electronic medical documents. A baseline evaluation of TTKs performance on
the Timebank v1.2 corpora of 183 news articles and a set of 100 VA hospital admission
and discharge notes showed an F-measure of 0.53 and 0.15, respectively. Project
development included the correction of missed and partial recognition of temporal
expressions, and the expansion of its coverage of time expressions for medical
documents. Post-modification, the TTK achieved an F-measure of 0.71 on a different set
of 100 VA hospital admission and discharge notes. Future work will evaluate TTKs
recognition of temporal expressions within additional sets of medical documents.
| Identifer | oai:union.ndltd.org:VANDERBILT/oai:VANDERBILTETD:etd-05242010-101636 |
| Date | 25 May 2010 |
| Creators | Ong, Ferdo Renardi |
| Contributors | Steven H. Brown, M.D., Joshua C. Denny, M.D., Dominik Aronsky, M.D. |
| Publisher | VANDERBILT |
| Source Sets | Vanderbilt University Theses |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.vanderbilt.edu/available/etd-05242010-101636/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Vanderbilt University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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