City Research Online

Abstract

We introduce a lightweight model that segments areas with the Ground Glass Opacity and Consolidation and predicts COVID-19 from chest CT scans. The model uses truncated ResNet18 and ResNet34 as a backbone net, and Mask R-CNN functionality for lesion segmentation. Without any class balancing and data manipulations, and using only a small fraction of the training data, COVID-CT-Mask-Net classification model with 6.12M total and 600K trainable parameters, achieves 91.35% COVID-19 sensitivity, 91.63% Common Pneumonia sensitivity, 96.98% true negative rate and 93.95% overall accuracy on COVIDx-CT dataset (21191 images). The full source code, models and pre-trained weights are available on https://github.com/AlexTS1980/COVID-CT-Mask-Net.

Publication Type:	Article
Additional Information:	© 2021 by the authors; licensee Research Lake International Inc., Canada. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License.
Publisher Keywords:	Convolutional neural networks, COVID-19, Lesion segmentation, Lesion detection
Subjects:	H Social Sciences > HM Sociology Q Science > QA Mathematics > QA75 Electronic computers. Computer science R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Departments:	School of Science & Technology > Computer Science

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