# COVIDNet-CT
**Repository Path**: evesystem/COVIDNet-CT
## Basic Information
- **Project Name**: COVIDNet-CT
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: AGPL-3.0
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-02-19
- **Last Updated**: 2024-06-01
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# COVID-Net Open Source Initiative - COVID-Net CT
**Note: The COVID-Net CT models provided here [as part of the COVID-Net Initiative](http://www.covid-net.ml) are intended to be used as reference models that can be built upon and enhanced as new data becomes available. They are currently at a research stage and not yet intended as production-ready models (i.e., not meant for direct clinical diagnosis), and we are working continuously to improve them as new data becomes available. Please do not use COVID-Net CT for self-diagnosis and seek help from your local health authorities.**
**Update 2021-01-26:** We released the [COVID-Net CT-2 models](docs/models.md) and [COVIDx CT-2A and CT-2B](https://www.kaggle.com/hgunraj/covidxct) datasets, comprising 194,922 CT slices from 3,745 patients and 201,103 CT slices from 4,501 patients respectively. The models and dataset are described [in this preprint](https://arxiv.org/abs/2101.07433).
**Update 2020-12-23:** The [COVID-Net CT-1 paper](https://www.frontiersin.org/articles/10.3389/fmed.2020.608525) was published in _Frontiers in Medicine_.
**Update 2020-12-03:** We released the [COVIDx CT-1](https://www.kaggle.com/dataset/c395fb339f210700ba392d81bf200f766418238c2734e5237b5dd0b6fc724fcb/version/1) dataset on Kaggle.
**Update 2020-09-13:** We released a preprint of the [COVID-Net CT paper](https://arxiv.org/abs/2009.05383).
Example CT scans of COVID-19 cases and their associated critical factors (highlighted in red) as identified by GSInquire.
The coronavirus disease 2019 (COVID-19) pandemic continues to have a tremendous impact on patients and healthcare systems around the world. In the fight against this novel disease, there is a pressing need for rapid and effective screening tools to identify patients infected with COVID-19, and to this end CT imaging has been proposed as one of the key screening methods which may be used as a complement to RT-PCR testing, particularly in situations where patients undergo routine CT scans for non-COVID-19 related reasons, patients have worsening respiratory status or developing complications that require expedited care, or patients are suspected to be COVID-19-positive but have negative RT-PCR test results. Early studies on CT-based screening have reported abnormalities in chest CT images which are characteristic of COVID-19 infection, but these abnormalities may be difficult to distinguish from abnormalities caused by other lung conditions. Motivated by this, in this study we introduce COVID-Net CT, a deep convolutional neural network architecture that is tailored for detection of COVID-19 cases from chest CT images via a machine-driven design exploration approach. Additionally, we introduce COVIDx CT, a benchmark CT image dataset derived from a variety of sources of CT imaging data currently comprising 201,103 images across 4,501 patient cases. Furthermore, in the interest of reliability and transparency, we leverage an explainability-driven performance validation strategy to investigate the decision-making behaviour of COVID-Net CT, and in doing so ensure that COVID-Net CT makes predictions based on relevant indicators in CT images. Both COVID-Net CT and the COVIDx CT dataset are available to the general public in an open-source and open access manner as part of the [COVID-Net Initiative](http://www.covid-net.ml). While COVID-Net CT is **not yet a production-ready screening solution**, we hope that releasing the model and dataset will encourage researchers, clinicians, and citizen data scientists alike to leverage and build upon them.
For a detailed description of the methodology behind COVID-Net CT and a full description of the COVIDx CT dataset, please read the [COVID-Net CT-1](https://www.frontiersin.org/articles/10.3389/fmed.2020.608525) and [COVID-Net CT-2](https://arxiv.org/abs/2101.07433) papers.
This work is made possible by a number of publicly available CT data sources. Licenses and acknowledgements for these datasets can be found [here](docs/licenses_acknowledgements.md).
Our desire is to encourage broad adoption and contribution to this project. Accordingly this project has been licensed under the GNU Affero General Public License 3.0. Please see [license file](LICENSE.md) for terms. If you would like to discuss alternative licensing models, please reach out to us at haydengunraj@gmail.com and a28wong@uwaterloo.ca or alex@darwinai.ca.
For COVID-Net CXR models and the COVIDx dataset for COVID-19 detection and severity assessment from chest X-ray images, please go to the [main COVID-Net repository](https://github.com/lindawangg/COVID-Net).
If you are a researcher or healthcare worker and you would like access to the **GSInquire tool to use to interpret COVID-Net CT results** on your data or existing data, please reach out to a28wong@uwaterloo.ca or alex@darwinai.ca.
If there are any technical questions after the README, FAQ, and past/current issues have been read, please post an issue or contact:
* haydengunraj@gmail.com
* linda.wang513@gmail.com
* jamesrenhoulee@gmail.com
If you find our work useful for your research, please cite:
```
@article{Gunraj2020,
author={Gunraj, Hayden and Wang, Linda and Wong, Alexander},
title={COVIDNet-CT: A Tailored Deep Convolutional Neural Network Design for Detection of COVID-19 Cases From Chest CT Images},
journal={Frontiers in Medicine},
volume={7},
pages={1025},
year={2020},
url={https://www.frontiersin.org/article/10.3389/fmed.2020.608525},
doi={10.3389/fmed.2020.608525},
issn={2296-858X}
}
```
```
@misc{Gunraj2021,
author={Gunraj, Hayden and Sabri, Ali and Koff, David and Wong, Alexander},
title={COVID-Net CT-2: Enhanced Deep Neural Networks for Detection of COVID-19 from Chest CT Images Through Bigger, More Diverse Learning},
year={2021},
eprint={arXiv:2101.07433}
}
```
## Core COVID-Net Team
* DarwinAI Corp., Canada and Vision and Image Processing Research Group, University of Waterloo, Canada
* Linda Wang
* Alexander Wong
* Zhong Qiu Lin
* Paul McInnis
* Audrey Chung
* Melissa Rinch
* Maya Pavlova
* Naomi Terhljan
* Siddharth Surana
* Hayden Gunraj, [COVID-Net for CT](https://github.com/haydengunraj/COVIDNet-CT)
* Jeffer Peng, [COVIDNet UI](https://github.com/darwinai/covidnet_ui)
* Vision and Image Processing Research Group, University of Waterloo, Canada
* James Lee
* Hossein Aboutalebi
* Alex MacLean
* Saad Abbasi
* Ashkan Ebadi and Pengcheng Xi (National Research Council Canada)
* Kim-Ann Git (Selayang Hospital)
* Abdul Al-Haimi, [COVID-19 ShuffleNet Chest X-Ray Model](https://github.com/aalhaimi/covid-net-cxr-shuffle)
* Dr. Ali Sabri (Department of Radiology, Niagara Health, McMaster University, Canada)
## Table of Contents
1. [Requirements to install on your system](#requirements)
2. [How to download and prepare the COVIDx CT dataset](docs/dataset.md)
3. [Steps for training, evaluation and inference](docs/train_eval_inference.md)
4. [Results](#results)
5. [Links to pretrained models](docs/models.md)
6. [Licenses and acknowledgements for the datasets used](docs/licenses_acknowledgements.md)
## Requirements
The main requirements are listed below:
* Tested with Tensorflow 1.15
* OpenCV 4.2.0
* Python 3.7
* Numpy
* Scikit-Learn
* Matplotlib
## Results
These are the final test results for the current COVID-Net CT models on the COVIDx CT dataset.
### COVID-Net CT-2 L (2A)
Confusion matrix for COVID-Net CT-2 L on the COVIDx CT-2A test dataset.
| Sensitivity (%) |
| Normal |
Pneumonia |
COVID-19 |
| 99.0 |
98.2 |
96.2 |
| Positive Predictive Value (%) |
| Normal |
Pneumonia |
COVID-19 |
| 99.4 |
97.2 |
96.7 |
Confusion matrix for COVID-Net CT-2 S on the COVIDx CT-2A test dataset.
| Sensitivity (%) |
| Normal |
Pneumonia |
COVID-19 |
| 98.9 |
98.1 |
95.7 |
| Positive Predictive Value (%) |
| Normal |
Pneumonia |
COVID-19 |
| 99.3 |
97.0 |
96.4 |