Classification of Hyper-scale Multimodal Imaging Datasets

Author:

MacFadyen Craig,Duraiswamy AjayORCID,Harris-Birtill David

Abstract

AbstractAlgorithms that can classify hyper-scale multi-modal datasets, comprising of millions of images, into constituent modality types can help researchers quickly retrieve and classify diagnostic imaging data, accelerating clinical outcomes. This research aims to demonstrate that a deep neural network that is trained on a hyper-scale dataset (4.5 million images) composed of heterogeneous multi-modal data, can be used to obtain significant modality classification accuracy (96%). By combining 102 medical imaging datasets, a dataset of 4.5 million images was created. A ResNet-50, ResNet-18 and VGG16 were trained to classify these images by the imaging modality used to capture them (Computed Tomography (CT), Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET), and X-ray) across many body locations. The classification accuracy of the models was then tested on unseen data.The best performing model achieved classification accuracy of 96% on unseen data. The model achieved a balanced accuracy of 86%.This research shows it is possible to train Deep Learning (DL) Convolutional Neural Networks (CNNs) with hyper-scale multimodal data-sets, composed of millions of images. The trained model can be used to classify images by modality, with the best performing model achieving a classification accuracy of 96%. Such models can find use in real-world applications with volumes of image data in the hyper-scale range, such as medical imaging repositories, or national healthcare institutions. Further research can expand this classification capability to include 3D-scans.

Publisher

Cold Spring Harbor Laboratory

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