Abstract
In December 2019, a member of the Coronaviridae family crossed the barriers between species and hit humans for the first time. Associated with Severe Acute Respiratory Syndrome (SARS) the virus was named SARS-CoV-2. The new coronavirus is responsible for 2019 coronavirus disease (Covid-19). Until August 20, the world has counted more than 22.5 million Covid-19 positive cases, about 14.4 million recovered cases, and more than 790 thousand deaths. In this study, we propose an automatic system for Covid-19 diagnosis using machine learning techniques and CT X-ray images named IKONOS-CT. The main idea is that healthcare professionals can upload the CT image into the system to be analyzed by an intelligent system. Then IKONOS-CT will provide a binary classification, differentiating Covid-19 patients from non-Covid-19 ones. For classification tasks we performed 25 experiments for the following classifiers: Multilayer Perceptron, Support Vector Machines, Random Tree and Random Forest, and Bayesian Networks. The best overall performance was found using Haralick as feature extractor and SVM with polynomial kernel of exponent 3. We found average results of accuracy of 96.994 ± 1.375%, kappa index of 0.940 ± 0.028, sensitivity/recall of 0.952 ± 0.024, precision of 0.987 ± 0.014, specificity of 0.987 ± 0.014, and area under ROC of 0.970 ± 0.014. By using a computationally low-cost method, based on Haralick extractor, it was possible to achieve high diagnosis performance. Indicating that an effective path for Covid-19 diagnosis may be found by combining AI for CT images classification and clinical analysis.
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The authors are grateful to the Federal University of Pernambuco and the Brazilian research agencies FACEPE, CAPES, and CNPq, for the partial financial support of this research.
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de Santana, M.A. et al. (2022). An Intelligent Tool to Support Diagnosis of Covid-19 by Texture Analysis of Computerized Tomography X-ray Images and Machine Learning. In: Pani, S.K., Dash, S., dos Santos, W.P., Chan Bukhari, S.A., Flammini, F. (eds) Assessing COVID-19 and Other Pandemics and Epidemics using Computational Modelling and Data Analysis. Springer, Cham. https://doi.org/10.1007/978-3-030-79753-9_15
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