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A Cascaded Convolutional Neural Network for X-ray Low-dose CT Image Denoising

By Dufan Wu, Kyungsang Kim, Georges El Fakhri and Quanzheng Li

Abstract

Image denoising techniques are essential to reducing noise levels and enhancing diagnosis reliability in low-dose computed tomography (CT). Machine learning based denoising methods have shown great potential in removing the complex and spatial-variant noises in CT images. However, some residue artifacts would appear in the denoised image due to complexity of noises. A cascaded training network was proposed in this work, where the trained CNN was applied on the training dataset to initiate new trainings and remove artifacts induced by denoising. A cascades of convolutional neural networks (CNN) were built iteratively to achieve better performance with simple CNN structures. Experiments were carried out on 2016 Low-dose CT Grand Challenge datasets to evaluate the method's performance.Comment: 9 pages, 9 figure

Topics: Computer Science - Computer Vision and Pattern Recognition, Statistics - Machine Learning, I.2.6, I.4.3, J.3
Year: 2017
OAI identifier: oai:arXiv.org:1705.04267

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