Document-level classification of CT pulmonary angiography reports based on an extension of the ConText algorithm.

Document-level classification of CT pulmonary angiography reports based on an extension of the ConText algorithm.
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DOI:
10.1016/j.jbi.2011.03.011
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发表时间:
2011-10
影响因子:
4.5
通讯作者:
Chapman WW
Chapman WW
中科院分区:
医学3区
文献类型:
--
作者:
Chapman BE;Lee S;Kang HP;Chapman WW

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在本文中,我们描述了一个应用程序,称为perception的文件级分类的CT肺血管造影报告。peclature基于ConText算法的通用版本,这是一种用于识别临床报告文档中特征的简单文本处理算法。使用肺栓塞来回答关于疾病状态(存在或不存在肺栓塞)、诊断的确定性状态(存在或不存在不确定性)、所识别的肺栓塞的时间状态(急性或慢性)以及检查的技术质量状态(诊断或非诊断)的问题。每个问题的黄金标准答案是从三个人类注释者的共识分类中确定的。将实验结果与使用unigrams和bigrams的朴素贝叶斯分类器进行比较。的敏感性阳性预测值为0.98(0.83),0.86(0.96),0.94(0.93)和0.60(0.90)对于疾病状态、质量状态、确定性状态和时间状态,分别为0.68(0.77)、0.67(0.87)、0.62(0.82)和0.04(0.25),以及使用二元组的朴素贝叶斯分类器为0.75(0.79)、0.52(0.69)、0.59(0.84)和0.04(0.25)。
In this paper we describe an application called peFinder for document-level classification of CT pulmonary angiography reports. peFinder is based on a generalized version of the ConText algorithm, a simple text processing algorithm for identifying features in clinical report documents. peFinder was used to answer questions about the disease state (pulmonary emboli present or absent), the certainty state of the diagnosis (uncertainty present or absent), the temporal state of an identified pulmonary embolus (acute or chronic), and the technical quality state of the exam (diagnostic or not diagnostic). Gold standard answers for each question were determined from the consensus classifications of three human annotators. peFinder results were compared to naive Bayes’ classifiers using unigrams and bigrams. The sensitivities (and positive predictive values) for peFinder were 0.98(0.83), 0.86(0.96), 0.94(0.93), and 0.60(0.90) for disease state, quality state, certainty state, and temporal state respectively, compared to 0.68(0.77), 0.67(0.87), 0.62(0.82), and 0.04(0.25) for the naive Bayes’ classifier using unigrams, and 0.75(0.79), 0.52(0.69), 0.59(0.84), and 0.04(0.25) for the naive Bayes’ classifier using bigrams.
DOI: 10.1097/01.ccm.0000284510.04248.66
发表时间: 2007-11-01
影响因子: 8.8
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期刊: ACADEMIC RADIOLOGY
影响因子: 4.8
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发表时间: 2009-10
影响因子: 4.5
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影响因子: 3.5
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