An Overview of Deep Learning Techniques on Chest X-Ray and CT Scan Identification of COVID-19

Table 1

Significant contributions of the neural network to deep learning [23, 24].

Milestone/contribution	Year
McCulloch-Pitts neuron	1943
Perceptron	1958
Backpropagation	1974
Neocognition	1980
Boltzmann machine	1985
Restricted Boltzmann machine	1986
Recurrent neural networks	1986
Autoencoders	1987
LeNet	1990
LSTM	1997
Deep belief networks	2006
Deep Boltzmann machine	2009