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      A review on medical imaging synthesis using deep learning and its clinical applications

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          Abstract

          This paper reviewed the deep learning‐based studies for medical imaging synthesis and its clinical application. Specifically, we summarized the recent developments of deep learning‐based methods in inter‐ and intra‐modality image synthesis by listing and highlighting the proposed methods, study designs, and reported performances with related clinical applications on representative studies. The challenges among the reviewed studies were then summarized with discussion.

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          Development and Validation of a Deep Learning Algorithm for Detection of Diabetic Retinopathy in Retinal Fundus Photographs.

          Deep learning is a family of computational methods that allow an algorithm to program itself by learning from a large set of examples that demonstrate the desired behavior, removing the need to specify rules explicitly. Application of these methods to medical imaging requires further assessment and validation.
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            Deep Convolutional Neural Networks for Computer-Aided Detection: CNN Architectures, Dataset Characteristics and Transfer Learning

            Remarkable progress has been made in image recognition, primarily due to the availability of large-scale annotated datasets and deep convolutional neural networks (CNNs). CNNs enable learning data-driven, highly representative, hierarchical image features from sufficient training data. However, obtaining datasets as comprehensively annotated as ImageNet in the medical imaging domain remains a challenge. There are currently three major techniques that successfully employ CNNs to medical image classification: training the CNN from scratch, using off-the-shelf pre-trained CNN features, and conducting unsupervised CNN pre-training with supervised fine-tuning. Another effective method is transfer learning, i.e., fine-tuning CNN models pre-trained from natural image dataset to medical image tasks. In this paper, we exploit three important, but previously understudied factors of employing deep convolutional neural networks to computer-aided detection problems. We first explore and evaluate different CNN architectures. The studied models contain 5 thousand to 160 million parameters, and vary in numbers of layers. We then evaluate the influence of dataset scale and spatial image context on performance. Finally, we examine when and why transfer learning from pre-trained ImageNet (via fine-tuning) can be useful. We study two specific computer-aided detection (CADe) problems, namely thoraco-abdominal lymph node (LN) detection and interstitial lung disease (ILD) classification. We achieve the state-of-the-art performance on the mediastinal LN detection, and report the first five-fold cross-validation classification results on predicting axial CT slices with ILD categories. Our extensive empirical evaluation, CNN model analysis and valuable insights can be extended to the design of high performance CAD systems for other medical imaging tasks.
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              Computed tomography--an increasing source of radiation exposure.

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                Author and article information

                Contributors
                xiaofeng.yang@emory.edu
                Journal
                J Appl Clin Med Phys
                J Appl Clin Med Phys
                10.1002/(ISSN)1526-9914
                ACM2
                Journal of Applied Clinical Medical Physics
                John Wiley and Sons Inc. (Hoboken )
                1526-9914
                11 December 2020
                January 2021
                : 22
                : 1 ( doiID: 10.1002/acm2.v22.1 )
                : 11-36
                Affiliations
                [ 1 ] Department of Radiation Oncology Emory University Atlanta GA USA
                [ 2 ] Winship Cancer Institute Emory University Atlanta GA USA
                Author notes
                [*] [* ] Author to whom correspondence should be addressed. Xiaofeng Yang

                E‐mail: xiaofeng.yang@ 123456emory.edu .

                Article
                ACM213121
                10.1002/acm2.13121
                7856512
                33305538
                fa4d707e-639a-4ba7-ad5b-37e00384dc2d
                © 2020 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.

                This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

                History
                : 13 May 2020
                : 12 November 2020
                : 21 November 2020
                Page count
                Figures: 3, Tables: 10, Pages: 26, Words: 22381
                Funding
                Funded by: Emory Winship Cancer Institute
                Award ID: Pilot Grant
                Funded by: National Cancer Institute , open-funder-registry 10.13039/100000054;
                Funded by: National Institutes of Health , open-funder-registry 10.13039/100000002;
                Award ID: R01CA215718
                Categories
                Review Article
                Review Articles
                Custom metadata
                2.0
                January 2021
                Converter:WILEY_ML3GV2_TO_JATSPMC version:5.9.7 mode:remove_FC converted:03.02.2021

                ct,deep learning,image synthesis,mri,pet,radiation therapy
                ct, deep learning, image synthesis, mri, pet, radiation therapy

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