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Computer-aided diagnosis of localized ground-glass opacity in the lung at CT: initial experience

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Authors
Kim, Kwang Gi; Goo, Jin Mo; Kim, Jong Hyo; Lee, Hyun Ju; Min, Byung Goo; Bae, Kyongtae; Im, Jung-Gi
Issue Date
2005-09-30
Publisher
Radiological Society of North America
Citation
Radiology 2005; 237:657–661
Abstract
The purpose of this study was to develop an automated scheme to facilitate detection of localized ground-glass opacity (GGO) in the lung at computed tomography (CT). Institutional review board approval and informed consent were not required. Two radiologists reviewed CT images from 14 patients (five men, nine women) who had lung cancer or metastasis and whose malignancy was classified as GGO. The lung region was sampled and completely covered with contiguous, 50% overlapping regions of interest (ROIs) measuring 30 x 30 pixels in size. The lung area within each ROI was analyzed to compute texture features and gaussian curve fitting features. Performance of the artificial neural networks (ANNs) measured by using the area under the receiver operating characteristic curve was 0.92. With a threshold of 0.9, the sensitivity of the ANN for detecting GGO ROIs was 94.3% (280 of 297 ROIs), and the positive predictive value was 29.1% (280 of 963 ROIs). A computerized scheme may hold promise in facilitating detection of localized GGO at CT.
ISSN
0033-8419 (Print)
1527-1315 (Electronic)
Language
English
URI
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=16192320

http://hdl.handle.net/10371/10133
DOI
https://doi.org/10.1148/radiol.2372041461
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College of Medicine/School of Medicine (의과대학/대학원)Radiology (영상의학전공)Journal Papers (저널논문_영상의학전공)
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