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Ultra Low Field (64 mT) brain MRI improves accessibility but suffers from reduced image quality compared to 3 T. As paired 64 mT - 3 T scans are scarce, we propose an unpaired 64 mT $\rightarrow$ 3 T translation framework that enhances…

Computer Vision and Pattern Recognition · Computer Science 2026-03-06 Youngmin Kim , Jaeyun Shin , Jeongchan Kim , Taehoon Lee , Jaemin Kim , Peter Hsu , Jelle Veraart , Jong Chul Ye

The reconstruction of human visual inputs from brain activity, particularly through functional Magnetic Resonance Imaging (fMRI), holds promising avenues for unraveling the mechanisms of the human visual system. Despite the significant…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Yujian Xiong , Wenhui Zhu , Zhong-Lin Lu , Yalin Wang

Ultra-high resolution 7 tesla (7T) magnetic resonance imaging (MRI) provides detailed anatomical views, offering better signal-to-noise ratio, resolution and tissue contrast than 3T MRI, though at the cost of accessibility. We present an…

Magnetic Resonance Imaging (MRI) is an inherently multi-contrast modality, where cross-contrast priors can be exploited to improve image reconstruction from undersampled data. Recently, diffusion models have shown remarkable performance in…

Image and Video Processing · Electrical Eng. & Systems 2025-10-27 Yue Wang , Yuanbiao Yang , Zhuo-xu Cui , Tian Zhou , Bingsheng Huang , Hairong Zheng , Dong Liang , Yanjie Zhu

Diffusion tensor imaging (DTI) provides crucial insights into the microstructure of the human brain, but it can be time-consuming to acquire compared to more readily available T1-weighted (T1w) magnetic resonance imaging (MRI). To address…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Shaorong Zhang , Tamoghna Chattopadhyay , Sophia I. Thomopoulos , Jose-Luis Ambite , Paul M. Thompson , Greg Ver Steeg

It is well known that magnetic resonance imaging (MRI) at 7 Tesla (7T) and higher magnets can provide much better signal sensitivity compared with lower field strengths. However, variety of commercially available ultra-high-field MRI coils…

Medical Physics · Physics 2020-06-05 Akbar Alipour , Alan C Seifert , Bradley Delman , Gregor Adriany , Priti Balchandani

Computed tomography (CT) is a cornerstone imaging modality for non-invasive, high-resolution visualization of internal anatomical structures. However, when the scanned object exceeds the scanner's field of view (FOV), projection data are…

Image and Video Processing · Electrical Eng. & Systems 2026-04-09 Zhenhao Li , Song Ni , Long Yang , Xiaojie Yin , Haijun Yu , Jiazhou Wang , Hongbin Han , Weigang Hu , Yixing Huang

Ultrahigh-field (UHF) magnetic resonance imaging (MRI), i.e., 7T MRI, provides superior anatomical details of internal brain structures owing to its enhanced signal-to-noise ratio and susceptibility-induced contrast. However, the widespread…

Computer Vision and Pattern Recognition · Computer Science 2024-02-14 Kwanseok Oh , Jieun Lee , Da-Woon Heo , Dinggang Shen , Heung-Il Suk

Supervised deep learning techniques can be used to generate synthetic 7T MRIs from 3T MRI inputs. This image enhancement process leverages the advantages of ultra-high-field MRI to improve the signal-to-noise and contrast-to-noise ratios of…

Image and Video Processing · Electrical Eng. & Systems 2024-07-10 Qiming Cui , Duygu Tosun , Pratik Mukherjee , Reza Abbasi-Asl

Multi-modal brain MRI provides essential complementary information for clinical diagnosis. However, acquiring all modalities in practice is often constrained by time and cost. To address this, various methods have been proposed to generate…

Image and Video Processing · Electrical Eng. & Systems 2026-05-07 Hanyeol Yang , Sunggyu Kim , Mi Kyung Kim , Yongseon Yoo , Yu-Mi Kim , Min-Ho Shin , Insung Chung , Sang Baek Koh , Hyeon Chang Kim , Jong-Min Lee

Efficient and accurate brain ventricle segmentation from clinical CT scans is critical for emergency surgeries like ventriculostomy. With the challenges in poor soft tissue contrast and a scarcity of well-annotated databases for clinical…

Image and Video Processing · Electrical Eng. & Systems 2024-07-16 Reihaneh Teimouri , Marta Kersten-Oertel , Yiming Xiao

Ultra-high field 7T fMRI offers notable advantages over 3T fMRI, including higher signal-to-noise and contrast-to-noise ratios, enabling finer spatial and temporal resolution. This study explores the differences in activation maps from…

Medical Physics · Physics 2025-09-09 Dalton H Bermudez

Metasurface inverse design is challenged by the intricate relationship between structural parameters and electromagnetic responses, as well as the high dimensionality of the optimization space. Local models, while commonly employed, quickly…

Diffusion MRI (dMRI) is an advanced imaging technique characterizing tissue microstructure and white matter structural connectivity of the human brain. The demand for high-quality dMRI data is growing, driven by the need for better…

Image and Video Processing · Electrical Eng. & Systems 2024-08-26 Xi Zhu , Wei Zhang , Yijie Li , Lauren J. O'Donnell , Fan Zhang

Diffusion MRI (dMRI) is a valuable imaging technique to study the brain in vivo. However, the resolution of dMRI is limited by the low signal-to-noise ratio (SNR) of this technique. Various acquisition strategies have been developed to…

Medical Physics · Physics 2023-05-30 Sajjad Feizollah , Christine L. Tardif

Magnetic Resonance Imaging (MRI) offers critical insights into microstructural details, however, the spatial resolution of standard 1.5T imaging systems is often limited. In contrast, 7T MRI provides significantly enhanced spatial…

Image and Video Processing · Electrical Eng. & Systems 2025-02-03 Zhe Wang , Yuhua Ru , Fabian Bauer , Aladine Chetouani , Fang Chen , Liping Zhang , Didier Hans , Rachid Jennane , Mohamed Jarraya , Yung Hsin Chen

Magnetic resonance imaging (MRI) is the gold standard imaging modality for numerous diagnostic tasks, yet its usefulness is tempered due to its high cost and infrastructural requirements. Low-cost very-low-field portable scanners offer new…

Functional Magnetic Resonance Imaging (fMRI) is an advanced neuroimaging method that enables in-depth analysis of brain activity by measuring dynamic changes in the blood oxygenation level-dependent (BOLD) signals. However, the…

Machine Learning · Computer Science 2025-09-26 Hwa Hui Tew , Junn Yong Loo , Yee-Fan Tan , Xinyu Tang , Hernando Ombao , Fuad Noman , Raphael C. -W. Phan , Chee-Ming Ting

Retinal fundus photography is significant in diagnosing and monitoring retinal diseases. However, systemic imperfections and operator/patient-related factors can hinder the acquisition of high-quality retinal images. Previous efforts in…

Image and Video Processing · Electrical Eng. & Systems 2024-09-18 Xuanzhao Dong , Vamsi Krishna Vasa , Wenhui Zhu , Peijie Qiu , Xiwen Chen , Yi Su , Yujian Xiong , Zhangsihao Yang , Yanxi Chen , Yalin Wang

For developing a detailed network model of the brain based on image reconstructions, it is necessary to spatially resolve crossing nerve fibers. The accuracy hereby depends on many factors, including the spatial resolution of the imaging…

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