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Development Of Artificial Intelligence (ai) Tool To Detect Covid-19 Condition From A Chest X-ray Ima

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By Author: Dr. S. Rajkumar, Professor & Head, Biomedical Engi
Total Articles: 4
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Rajalakshmi group of educational institutions in Chennai is familiar for their versatility of academic excellence and research activities. In the group, Centre for Medical Imaging is formed with the objective of creating proficient solutions in medical imaging applications. The centre has members from faculty fraternity, students, and medical imaging professionals.

Ever since the onset of the pandemic COVID-19, the members of the centre discusses the research progress across global in the aspect of medical imaging to detect COVID-19 through various imaging modalities like X-Ray. Ultrasound and CT scan. Initially, we were thinking to use ultrasound images but due to some technical issues, we couldn’t follow it up.

Later we decided to use chest X-ray images and incidentally, we were able to get around 100 COVID-19 affected subjects’ chest X-ray images through open-source Canadian research forum. With the acquired images we planned to develop an Artificial Intelligence (AI) tool to detect COVID-19 condition from the test chest X-ray image.

We decided to add the provision for detecting CAP (Community-Acquired ...
... Pneumonia) besides to COVID-19 in the proposed tool. The reason for the inclusion of CAP is that there is a relatively high possibility of getting this condition. We have decided to detect the normal conditions also. Hence, we decided to develop a three-class classifier using that we can detect COVID-19, CAP and normal condition from the test X-ray image.

We acquired the necessary CAP & normal chest X-ray images through RSNA (Radiological Society of North America) for training the AI tool. We used 14,148 chest X-ray images of all these three classes for rigorously training the neural network inbuilt in the AI tool. The training process underwent different iterations until we reach a training accuracy of 99.9. In the testing process, 1661 images were used and by adopting different strategies we are able to get a testing accuracy of 95.4.

Confusion Matrix


Result Parameters:
Precision: 97.18%
Sensitivity/Recall: 94.51%
Specificity: 99.65%
Accuracy: 95.4%

Deployment of the developed tool in the website is under process. However with the inclusion of more Chest X-ray images of COVID-19 positive cases in the training process, the testing accuracy could be improved. The necessary steps are in the pipeline to acquire more images.

The persons involved in this process are

Dr.Haree Shankar Meganathan,
Trust member
Rajalakshmi Group of institutions
Consultant Radiologist

Dr.S.Rajkumar,
Professor & Head
Department of Biomedical Engineering

Dr.V.Sapthagirivasan
Adjunct Professor
Department of Biomedical Engineering

Mr.P.V.Rajaraman
Assistant Professor
Department of Computer Science Engineering

Ms.K.Tejeswinee
Assistant Professor
Department of Computer Science Engineering

Mr.Ashwin Ramesh
Student
III Year CSE

Contributions:

Dr.S.Rajkumar has proposed to develop an AI tool to detect COVID-19 condition using imaging technology. Dr.V.Sapthagirivasan suggested to use chest X-ray and shared the website links of the open-source images. The literature survey relating to the proposed work was carried out by Mr.P.V.Rajaraman & Ms.K.Tejeswinee. The methodology to design a successful model is decided after a series of online meetings by all the members. The programming part and implementation has been carried out by Mr.Ashwin Ramesh through periodic discussion with Dr.S.Rajkumar & Dr.V.Sapthagirivasan. The drafting of the manuscript is being carried by Mr.P.V.Rajaraman & Ms.K.Tejeswinee by having a discussion with remaining members.

The entire process is been successfully carried out with the professional guidance and suggestions of Dr.Haree Shankar Meganathan. Further, he is taking necessary measures to deploy this developed AI tool to the medical community and in turn services to the society at this crucial juncture.

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