COVID Net: A Tailored Deep Convolutional Neural Network Design for Detection of COVID 19 Cases from Chest Radiography Images
The COVID 19 pandemic continues to have a devastating effect on the health and well being of the global population. A critical step in the fight against COVID 19 is effective screening of infected patients, with one of the key screening approaches being radiological imaging using chest radiography. It was found in early studies that patients present abnormalities in chest radiography images that are characteristic of those infected with COVID 19. Motivated by this, a number of artificial intelligence (AI) systems based on deep learning have been proposed and results have been shown to be quite promising in terms of accuracy in detecting patients infected with COVID 19 using chest radiography images. However, to the best of the authors' knowledge, these developed AI systems have been closed source and unavailable to the research community for deeper understanding and extension, and unavailable for public access and use. Therefore, in this study we introduce COVID Net, a deep convolutional neural network design tailored for the detection of COVID 19 cases from chest radiography images that is open source and available to the general public. We also describe the chest radiography dataset leveraged to train COVID Net, which we will refer to as COVIDx and is comprised of 16,756 chest radiography images across 13,645 patient cases from two open access data repositories. Furthermore, we investigate how COVID Net makes predictions using an explainability method in an attempt to gain deeper insights into critical factors associated with COVID cases, which can aid clinicians in improved screening. By no means a productionready solution, the hope is that the open access COVID Net, along with the description on constructing the open source COVIDx dataset, will be leveraged and build upon by both researchers and citizen data scientists alike to accelerate the development of highly accurate yet practical deep learning solutions for detecting COVID 19 cases and accelerate treatment of those who need it the most.
ArXiv