Volume 20 No 9 (2022)
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Performance analysis of Rheumatoid Arthritis using Convolutional Neural Networks
Mahesh Kumar A S, Mallikarjunaswamy M S, Chandrashekara S
Abstract
Rheumatoid Arthritis (RA) is a kind of an autoimmune and chronic disease. RA generally observed with
inflammation, swollen, stiffness, joint pain and loss of functionality in the joints. Inflammation starts at
smaller joints of the body, in later stages inflammation spread to heart and other organs of the body.
Initial symptom are shown to be less effective but in later stage it causes major difference in the
functionality of the joints. Therefore, an accurate RA detection in its early stage is very much essential.
Various modalities are being used for the purpose of RA diagnosis notably radiography, ultrasound and
Magnetic Resonance Imaging (MRI). Even though various modalities used in the assessment of joint
damage and position changes, plain radiography is the best and effective method. Different scoring
methods used in the RA assessment but all scoring methods involved the joint evaluation of finger,
hands, feet and wrist. The traditional scoring methods and manual diagnosis process require more
human intervention and time. The development of CNN architecture for automated RA detection avoids
manual method of preprocessing, handcrafted segmentation and classification. CNN architecture plays
vital role in the RA disease diagnosis and automation. The work includes the development of four
different CNN architectures for RA detection namely ResNet50, VGG16, DenseNet121 and InceptionV3.
All the models have trained with augmented and non-augmented dataset. At the end of 50th epoch,
InceptionV3 accuracy reached 98.91% with error of 1.85%. DenseNet121 model reached 97.27% with
minimum error of 7.73%. InceptionV3 validation accuracy reached 98.8% on validation set that
indicates that InceptionV3 has low variance compared to other models. Even inceptionV3 perform well
on F1 score, precision, recall and specificity plots of other models
Keywords
Convolutional Neural Network (CNN), Inceptionv3, Rheumatoid Arthritis (RA), ResNet50, Vgg16, X-ray
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