COVID-19 Computerized tomography 16 Humans 13 human 13 Article 12 computer assisted tomography 12 coronavirus disease 2019 12 SARS-CoV-2 11 x-ray computed tomography 10 Deep learning 9 Tomography, X-Ray Computed 9 deep learning 9 diagnostic imaging 9 image segmentation 9 Lung 8 lung 8 sensitivity and specificity 7 Coronaviruses 6 Diagnosis 6 Learning systems 6 controlled study 6 Coronavirus 5 Medical imaging 5 procedures 5 training 5 Deep Learning 4 convolutional neural network 4 diagnostic test accuracy study 4 feature extraction 4 ground glass opacity 4