RT Journal Article SR Electronic T1 An externally validated fully automated deep learning algorithm to classify COVID-19 and other pneumonias on chest computed tomography JF ERJ Open Research JO erjor FD European Respiratory Society SP 00579-2021 DO 10.1183/23120541.00579-2021 VO 8 IS 2 A1 Akshayaa Vaidyanathan A1 Julien Guiot A1 Fadila Zerka A1 Flore Belmans A1 Ingrid Van Peufflik A1 Louis Deprez A1 Denis Danthine A1 Gregory Canivet A1 Philippe Lambin A1 Sean Walsh A1 Mariaelena Occhipinti A1 Paul Meunier A1 Wim Vos A1 Pierre Lovinfosse A1 Ralph T.H. Leijenaar YR 2022 UL http://openres.ersjournals.com/content/8/2/00579-2021.abstract AB Purpose In this study, we propose an artificial intelligence (AI) framework based on three-dimensional convolutional neural networks to classify computed tomography (CT) scans of patients with coronavirus disease 2019 (COVID-19), influenza/community-acquired pneumonia (CAP), and no infection, after automatic segmentation of the lungs and lung abnormalities.Methods The AI classification model is based on inflated three-dimensional Inception architecture and was trained and validated on retrospective data of CT images of 667 adult patients (no infection n=188, COVID-19 n=230, influenza/CAP n=249) and 210 adult patients (no infection n=70, COVID-19 n=70, influenza/CAP n=70), respectively. The model's performance was independently evaluated on an internal test set of 273 adult patients (no infection n=55, COVID-19 n= 94, influenza/CAP n=124) and an external validation set from a different centre (305 adult patients: COVID-19 n=169, no infection n=76, influenza/CAP n=60).Results The model showed excellent performance in the external validation set with area under the curve of 0.90, 0.92 and 0.92 for COVID-19, influenza/CAP and no infection, respectively. The selection of the input slices based on automatic segmentation of the abnormalities in the lung reduces analysis time (56 s per scan) and computational burden of the model. The Transparent Reporting of a Multivariable Prediction Model for Individual Prognosis or Diagnosis (TRIPOD) score of the proposed model is 47% (15 out of 32 TRIPOD items).Conclusion This AI solution provides rapid and accurate diagnosis in patients suspected of COVID-19 infection and influenza.A fully automated artificial intelligence-based network is proposed to classify CT volumes of patients affected with COVID-19 or influenza/CAP, and in the uninfected https://bit.ly/3MJrVRi