COVID-19 Humans 15 SARS-CoV-2 15 human 15 Article 13 coronavirus disease 2019 12 computer assisted tomography 9 image segmentation 9 Computerized tomography 8 deep learning 8 sensitivity and specificity 7 Deep learning 6 Lung 6 controlled study 6 diagnostic imaging 6 lung 6 x-ray computed tomography 6 Tomography, X-Ray Computed 5 feature extraction 5 procedures 5 thorax radiography 5 Diagnosis 4 Learning systems 4 Radiography, Thoracic 4 algorithm 4 convolutional neural network 4 diagnostic test accuracy study 4 epidemic 4 ground glass opacity 4 isolation and purification 4