Named Entity Recognition on Software Requirements Specification Documents

Editorial do v. 15, n. 2Nesta segunda edição de 2016 (v. 15, n. 2), a RESI traz quatro artigos, dois deles na seção Foco na tecnologia, um na seção Foco nas pessoas e um na seção E-gov no Brasil.São eles:UMA ABORDAGEM METODOLÓGICA PARA A IMPLEMENTAÇÃO MULTI-MODELOS DE QUALIDADE DE SOFTWARE ADOTANDO A CERTICS E O CMMI-DEV, de Sandro Ronaldo Bezerra Oliveira, Fabrício Wickey da Silva Garcia e Clênio Figueiredo Salviano, PROBLEM-BASED SOFTWARE REQUIREMENTS SPECIFICATION, de Rafael Gosrki M. de Souza e Paulo Cézar Stadzisz, INTERAÇÕES ESPONTÂNEAS EM AMBIENTE VIRTUAL DE APRENDIZAGEM POR MEIO DE DISPOSITIVOS MÓVEIS: UM MAPEAMENTO BASEADO NA ANÁLISE DE REGISTROS DE ACESSO AO SISTEMA, de Ana Luisa Mülbert e Osmar de Oliveira Braz Junior e ANÁLISE DO NÍVEL DE ABERTURA DE DADOS GOVERNAMENTAIS DA ÁREA DO TRÂNSITO NO BRASIL, de Ricardo Matheus, Denis Rodrigues, José Carlos Vaz e Martin Jayo.Tenham todos uma ótima leitura!

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Developing a RadLex-based Named Entity Recognition Tool for Mining Textual Radiology Reports (Preprint)

10.2196/preprints.25378 ◽

2020 ◽

Author(s):

Shintaro Tsuji ◽

Andrew Wen ◽

Naoki Takahashi ◽

Hongjian Zhang ◽

Katsuhiko Ogasawara ◽

...

Keyword(s):

Named Entity Recognition ◽

Noun Phrases ◽

General Purpose ◽

Entity Recognition ◽

Free Text ◽

Clinical Text ◽

Named Entity ◽

Radiology Reports ◽

Two Measures ◽

F Measure

BACKGROUND Named entity recognition (NER) plays an important role in extracting the features of descriptions for mining free-text radiology reports. However, the performance of existing NER tools is limited because the number of entities depends on its dictionary lookup. Especially, the recognition of compound terms is very complicated because there are a variety of patterns. OBJECTIVE The objective of the study is to develop and evaluate a NER tool concerned with compound terms using the RadLex for mining free-text radiology reports. METHODS We leveraged the clinical Text Analysis and Knowledge Extraction System (cTAKES) to develop customized pipelines using both RadLex and SentiWordNet (a general-purpose dictionary, GPD). We manually annotated 400 of radiology reports for compound terms (Cts) in noun phrases and used them as the gold standard for the performance evaluation (precision, recall, and F-measure). Additionally, we also created a compound-term-enhanced dictionary (CtED) by analyzing false negatives (FNs) and false positives (FPs), and applied it for another 100 radiology reports for validation. We also evaluated the stem terms of compound terms, through defining two measures: an occurrence ratio (OR) and a matching ratio (MR). RESULTS The F-measure of the cTAKES+RadLex+GPD was 32.2% (Precision 92.1%, Recall 19.6%) and that of combined the CtED was 67.1% (Precision 98.1%, Recall 51.0%). The OR indicated that stem terms of “effusion”, "node", "tube", and "disease" were used frequently, but it still lacks capturing Cts. The MR showed that 71.9% of stem terms matched with that of ontologies and RadLex improved about 22% of the MR from the cTAKES default dictionary. The OR and MR revealed that the characteristics of stem terms would have the potential to help generate synonymous phrases using ontologies. CONCLUSIONS We developed a RadLex-based customized pipeline for parsing radiology reports and demonstrated that CtED and stem term analysis has the potential to improve dictionary-based NER performance toward expanding vocabularies.

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