Cited by 525COVID-19 diagnosis using AIAdvanced Neural Network ApplicationsRadiomics and Machine Learning in Medical Imaging

CovXNet: A multi-dilation convolutional neural network for automatic COVID-19 and other pneumonia detection from chest X-ray images with transferable multi-receptive feature optimization

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Mahmud, Tanvir, Rahman, Md Awsafur, Fattah, Shaikh Anowarul·2020·Computers in Biology and Medicine

Abstract

With the recent outbreak of COVID-19, fast diagnostic testing has become one of the major challenges due to the critical shortage of test kit. Pneumonia, a major effect of COVID-19, needs to be urgently diagnosed along with its underlying reasons. In this paper, deep learning aided automated COVID-19 and other pneumonia detection schemes are proposed utilizing a small amount of COVID-19 chest X-rays. A deep convolutional neural network (CNN) based architecture, named as CovXNet, is proposed that utilizes depthwise convolution with varying dilation rates for efficiently extracting diversified features from chest X-rays. Since the chest X-ray images corresponding to COVID-19 caused pneumonia and other traditional pneumonias have significant similarities, at first, a large number of chest X-rays corresponding to normal and (viral/bacterial) pneumonia patients are used to train the proposed CovXNet. Learning of this initial training phase is transferred with some additional fine-tuning layers that are further trained with a smaller number of chest X-rays corresponding to COVID-19 and other pneumonia patients. In the proposed method, different forms of CovXNets are designed and trained with X-ray images of various resolutions and for further optimization of their predictions, a stacking algorithm is employed. Finally, a gradient-based discriminative localization is integrated to distinguish the abnormal regions of X-ray images referring to different types of pneumonia. Extensive experimentations using two different datasets provide very satisfactory detection performance with accuracy of 97.4% for COVID/Normal, 96.9% for COVID/Viral pneumonia, 94.7% for COVID/Bacterial pneumonia, and 90.2% for multiclass COVID/normal/Viral/Bacterial pneumonias. Hence, the proposed schemes can serve as an efficient tool in the current state of COVID-19 pandemic. All the architectures are made publicly available at: https://github.com/Perceptron21/CovXNet.

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Authors
Mahmud, T., Rahman, M. A., & Fattah, S. A.
Affiliations
Bangladesh University of Engineering and Technology (BD)
Corresponding author
Fattah, Shaikh Anowarul
Venue
Computers in Biology and Medicine
Publisher
Elsevier BV
Published
2020-07
Volume
122
Pages
103869
ISSN
0010-4825 (ISSN-L)
OpenAlex
W3036638392
Cited by
525
References
30
Citations by year
2026: 16 · 2025: 31 · 2024: 63 · 2023: 96 · 2022: 141 · 2021: 151 · 2020: 27
FWCI
50.50
Type
journal article
Language
en
Open access
Locations
  • Computers in Biology and Medicine (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › COVID-19 diagnosis using AI
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Neural Network Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Radiomics and Machine Learning in Medical Imaging
Keywords
COVID-19 detection, pneumonia detection, chest X-ray images, depthwise convolution, transfer learning, fine-tuning, viral pneumonia, bacterial pneumonia, automated diagnosis
MeSH terms
Betacoronavirus, Deep Learning, COVID-19, SARS-CoV-2, COVID-19 Testing, Algorithms, Humans, Image Processing, Computer-Assisted, Pneumonia, Viral, Radiography, Thoracic, Reproducibility of Results, Databases, Factual, Neural Networks, Computer, Coronavirus Infections, Clinical Laboratory Techniques, Pandemics

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