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Computed tomography (CT) has been widely used for medical diagnosis, assessment, and therapy planning and guidance. In reality, CT images may be affected adversely in the presence of metallic objects, which could lead to severe metal…

Image and Video Processing · Electrical Eng. & Systems 2020-09-17 Lequan Yu , Zhicheng Zhang , Xiaomeng Li , Lei Xing

A conventional approach to computed tomography (CT) or cone beam CT (CBCT) metal artifact reduction is to replace the X-ray projection data within the metal trace with synthesized data. However, existing projection or sinogram completion…

Image and Video Processing · Electrical Eng. & Systems 2022-03-24 Haofu Liao , Wei-An Lin , Zhimin Huo , Levon Vogelsang , William J. Sehnert , S. Kevin Zhou , Jiebo Luo

The presence of metallic implants often introduces severe metal artifacts in the X-ray CT images, which could adversely influence clinical diagnosis or dose calculation in radiation therapy. In this work, we present a novel…

Image and Video Processing · Electrical Eng. & Systems 2021-09-29 Lequan Yu , Zhicheng Zhang , Xiaomeng Li , Hongyi Ren , Wei Zhao , Lei Xing

Computed tomography (CT) is an imaging modality widely used for medical diagnosis and treatment. CT images are often corrupted by undesirable artifacts when metallic implants are carried by patients, which creates the problem of metal…

Image and Video Processing · Electrical Eng. & Systems 2019-07-02 Wei-An Lin , Haofu Liao , Cheng Peng , Xiaohang Sun , Jingdan Zhang , Jiebo Luo , Rama Chellappa , Shaohua Kevin Zhou

Metal implants can heavily attenuate X-rays in computed tomography (CT) scans, leading to severe artifacts in reconstructed images, which significantly jeopardize image quality and negatively impact subsequent diagnoses and treatment…

Medical Physics · Physics 2021-08-11 Tao Wang , Wenjun Xia , Yongqiang Huang , Huaiqiang Sun , Yan Liu , Hu Chen , Jiliu Zhou , Yi Zhang

In computed tomography (CT), metal implants increase the inconsistencies between the measured data and the linear attenuation assumption made by analytic CT reconstruction algorithms. The inconsistencies give rise to dark and bright bands…

Computer Vision and Pattern Recognition · Computer Science 2018-08-07 Sungsoo Ha , Klaus Mueller

Metal artifact correction is a challenging problem in cone beam computed tomography (CBCT) scanning. Metal implants inserted into the anatomy cause severe artifacts in reconstructed images. Widely used inpainting-based metal artifact…

Image and Video Processing · Electrical Eng. & Systems 2023-10-10 Harshit Agrawal , Ari Hietanen , Simo Särkkä

During X-ray computed tomography (CT) scanning, metallic implants carrying with patients often lead to adverse artifacts in the captured CT images and then impair the clinical treatment. Against this metal artifact reduction (MAR) task, the…

Image and Video Processing · Electrical Eng. & Systems 2022-12-27 Hong Wang , Qi Xie , Yuexiang Li , Yawen Huang , Deyu Meng , Yefeng Zheng

Recent CT Metal Artifacts Reduction (MAR) methods are often based on image-to-image convolutional neural networks for adjustment of corrupted sinograms or images themselves. In this paper, we are exploring the capabilities of a multi-domain…

Computer Vision and Pattern Recognition · Computer Science 2020-05-12 Artem Pimkin , Alexander Samoylenko , Natalia Antipina , Anna Ovechkina , Andrey Golanov , Alexandra Dalechina , Mikhail Belyaev

Computed tomography (CT) metal artifact reduction (MAR) aims to reduce the severe streaking artifacts induced by metallic implants and other high-density objects. Effective MAR generally requires both accurate artifact localization and…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Zilong Li , Chenglong Ma , Yiming Lei , Yuanlin Li , Jing Han , Jiannan Liu , Huidong Xie , Junping Zhang , Yi Zhang , Hongming Shan

An X-ray computed tomography (CT), metal artifact reduction (MAR) remains a major challenge because metallic implants violate standard CT forward-model assumptions, producing severe streaking and shadowing artifacts that degrade diagnostic…

Image and Video Processing · Electrical Eng. & Systems 2026-03-17 Hyoung Suk Park , Kiwan Jeon

Current deep neural network based approaches to computed tomography (CT) metal artifact reduction (MAR) are supervised methods which rely heavily on synthesized data for training. However, as synthesized data may not perfectly simulate the…

Image and Video Processing · Electrical Eng. & Systems 2019-12-02 Haofu Liao , Wei-An Lin , Jianbo Yuan , S. Kevin Zhou , Jiebo Luo

Metal artifacts caused by the presence of metallic implants tremendously degrade the reconstructed computed tomography (CT) image quality, affecting clinical diagnosis or reducing the accuracy of organ delineation and dose calculation in…

Metal objects pose a significant challenge in cone-beam computed tomography, as their strong and energy-dependent X-ray attenuation leads to inconsistent projections and severe streaking and shading artifacts in reconstructed images. These…

Computed tomography (CT) images are often severely corrupted by artifacts in the presence of metals. Existing supervised metal artifact reduction (MAR) approaches suffer from performance instability on known data due to their reliance on…

Computer Vision and Pattern Recognition · Computer Science 2025-12-11 Jie Wen , Chenhe Du , Xiao Wang , Yuyao Zhang

In the presence of metal implants, metal artifacts are introduced to x-ray CT images. Although a large number of metal artifact reduction (MAR) methods have been proposed in the past decades, MAR is still one of the major problems in…

Medical Physics · Physics 2018-04-23 Yanbo Zhang , Hengyong Yu

Since the invention of modern CT systems, metal artifacts have been a persistent problem. Due to increased scattering, amplified noise, and insufficient data collection, it is more difficult to suppress metal artifacts in cone-beam CT,…

Medical Physics · Physics 2023-10-27 Tianling Lyu , Zhan Wu , Gege Ma , Chen Jiang , Xinyun Zhong , Yan Xi , Yang Chen , Wentao Zhu

The positive outcome of a trauma intervention depends on an intraoperative evaluation of inserted metallic implants. Due to occurring metal artifacts, the quality of this evaluation heavily depends on the performance of so-called Metal…

Image and Video Processing · Electrical Eng. & Systems 2021-12-07 Tristan M. Gottschalk , Andreas Maier , Florian Kordon , Björn W. Kreher

During the process of computed tomography (CT), metallic implants often cause disruptive artifacts in the reconstructed images, impeding accurate diagnosis. Several supervised deep learning-based approaches have been proposed for reducing…

Image and Video Processing · Electrical Eng. & Systems 2024-01-08 Xuan Liu , Yaoqin Xie , Songhui Diao , Shan Tan , Xiaokun Liang

In computed tomography (CT), the presence of metallic implants in patients often leads to disruptive artifacts in the reconstructed images, hindering accurate diagnosis. Recently, a large amount of supervised deep learning-based approaches…

Image and Video Processing · Electrical Eng. & Systems 2024-06-21 Xinquan Yang , Guanqun Zhou , Wei Sun , Youjian Zhang , Zhongya Wang , Jiahui He , Zhicheng Zhang
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