Learning systems Humans 18 human 18 machine learning 17 Article 15 Deep learning 13 deep learning 12 Artificial intelligence 9 training 9 Diagnosis 8 diagnostic imaging 8 Deep Learning 7 learning algorithm 7 support vector machine 7 Learning algorithms 6 Medical imaging 6 controlled study 6 convolutional neural network 6 Machine Learning 5 Machine-learning 5 artificial neural network 5 feature extraction 5 sensitivity and specificity 5 Biomedical signal processing 4 COVID-19 4 Classification (of information) 4 Classification accuracy 4 Diseases 4 Internet of things 4 Learning frameworks 4