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In this study, an attempt has been made to differentiate Novel Coronavirus-2019 (COVID-19) conditions from healthy subjects in Chest radiographs using a simplified end-to-end Convolutional Neural Network (CNN) model and occlusion sensitivity maps Early detection and faster automated screening of the COVID-19 patients is essential For this, the images are considered from publicly available datasets Significant biomarkers representing critical image features are extracted from CNN by experimentally investigating on cross-validation methods and hyperparameter settings The performance of the network is evaluated using standard metrics Perturbation based occlusion sensitivity maps are employed on the features obtained from the classification model to visualise the localization of abnormal areas Results demonstrate that the simplified CNN model with optimised parameters is able to extract significant features with a sensitivity of 97 35% and F-measure of 96 71% to detect COVID-19 images The algorithm achieves an Area Under the Curve-Receiver Operating Characteristic score of 99 4% with Matthews correlation coefficient of 0 93 High value of Diagnostic odds ratio is also obtained Occlusion sensitivity maps provide precise localization of abnormal regions by identifying COVID-19 conditions As early detection through chest radiographic images are useful for automated screening of the disease, this method appears to be clinically relevant in providing a visual diagnostic solution using a simplified and efficient model © 2020, Springer Science+Business Media, LLC, part of Springer Nature
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Differentiation of COVID-19 conditions in planar chest radiographs using optimized convolutional neural networks
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