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DOI: 10.14569/IJACSA.2021.0120717
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Anomaly Detection on Medical Images using Autoencoder and Convolutional Neural Network

Author 1: Rashmi Siddalingappa
Author 2: Sekar Kanagaraj

International Journal of Advanced Computer Science and Applications(IJACSA), Volume 12 Issue 7, 2021.

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Abstract: Detection of anomalies from the medical image dataset improves prognosis by discovering new facts hidden in the data. The present study aims to discuss anomaly detection using autoencoders and convolutional neural networks. The autoencoder identifies the imbalance between normal and abnormal samples. They create learning models flexible and accurate on training data. The problem is addressed in four stages: 1) training: an autoencoder is initialized with the hyper-parameters and trained on the lung cancer CT scan images, 2) test: the autoencoder reconstructs the input from the latent space representation with a slight variation from the original data, indicated by a reconstruction error as Mean Squared Error (MSE), 3) evaluate: the MSE value of the training and test dataset are compared. The MSE values of anomalous data are higher than a base threshold, detecting those as anomalies, 4) validate: the efficiency metrics such as accuracy and MSE scores are used at both training and validation phases. The dataset was further classified as benign and malignant. The accuracy reported for outlier detection and the classification task is 98% and 97.2%. Thus, the proposed autoencoder-based anomaly detection could positively isolate anomalies from the CT scan images of lung cancer.

Keywords: Anomalies; autoencoder; convolutional neural networks (CNN) (ConvNets); deep neural network architecture; regularization

Rashmi Siddalingappa and Sekar Kanagaraj, “Anomaly Detection on Medical Images using Autoencoder and Convolutional Neural Network” International Journal of Advanced Computer Science and Applications(IJACSA), 12(7), 2021. http://dx.doi.org/10.14569/IJACSA.2021.0120717

@article{Siddalingappa2021,
title = {Anomaly Detection on Medical Images using Autoencoder and Convolutional Neural Network},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2021.0120717},
url = {http://dx.doi.org/10.14569/IJACSA.2021.0120717},
year = {2021},
publisher = {The Science and Information Organization},
volume = {12},
number = {7},
author = {Rashmi Siddalingappa and Sekar Kanagaraj}
}



Copyright Statement: This is an open access article licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, even commercially as long as the original work is properly cited.

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