Automated classification of limb fractures from free-text radiology reports using a clinician-informed gazetteer methodology

Wagholikar, Amol, Zuccon, Guido, Nguyen, Anthony, Chu, Kevin, Martin, Shane, Lai, Kim, & Greenslade, Jaimi (2013) Automated classification of limb fractures from free-text radiology reports using a clinician-informed gazetteer methodology. Australasian Medical Journal, 6(5), pp. 301-307.

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Abstract

Background Timely diagnosis and reporting of patient symptoms in hospital emergency departments (ED) is a critical component of health services delivery. However, due to dispersed information resources and a vast amount of manual processing of unstructured information, accurate point-of-care diagnosis is often difficult.

Aims The aim of this research is to report initial experimental evaluation of a clinician-informed automated method for the issue of initial misdiagnoses associated with delayed receipt of unstructured radiology reports.

Method A method was developed that resembles clinical reasoning for identifying limb abnormalities. The method consists of a gazetteer of keywords related to radiological findings; the method classifies an X-ray report as abnormal if it contains evidence contained in the gazetteer. A set of 99 narrative reports of radiological findings was sourced from a tertiary hospital. Reports were manually assessed by two clinicians and discrepancies were validated by a third expert ED clinician; the final manual classification generated by the expert ED clinician was used as ground truth to empirically evaluate the approach.

Results The automated method that attempts to individuate limb abnormalities by searching for keywords expressed by clinicians achieved an F-measure of 0.80 and an accuracy of 0.80.

Conclusion While the automated clinician-driven method achieved promising performances, a number of avenues for improvement were identified using advanced natural language processing (NLP) and machine learning techniques.

Impact and interest:

2 citations in Scopus
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ID Code: 70152
Item Type: Journal Article
Refereed: Yes
Keywords: Limb fractures, emergency department, radiology reports, classification, rule-based method, machine learning
DOI: 10.4066/AMJ.2013.1651
ISSN: 18361935
Divisions: Current > Schools > School of Information Systems
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 AMJ
Deposited On: 15 Apr 2014 00:22
Last Modified: 16 Apr 2014 00:08

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