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Diffusion magnetic resonance imaging (dMRI) plays a vital role in both clinical diagnostics and neuroscience research. However, its inherently low signal-to-noise ratio (SNR), especially under high diffusion weighting, significantly…

定量方法 · 定量生物学 2026-02-27 Jine Xie , Zhicheng Zhang , Yunwei Chen , Yanqiu Feng , Xinyuan Zhang

Magnetic resonance imaging (MRI) is a vital clinical diagnostic tool, yet its application is limited by prolonged scan times. Accelerating MRI reconstruction addresses this issue by reconstructing high-fidelity MR images from undersampled…

计算机视觉与模式识别 · 计算机科学 2025-11-10 Jingran Xu , Yuanyuan Liu , Yuanbiao Yang , Zhuo-Xu Cui , Jing Cheng , Qingyong Zhu , Nannan Zhang , Yihang Zhou , Dong Liang , Yanjie Zhu

Achieving both high precision and large dynamic range remains a central challenge in quantum metrology, as improving local sensitivity typically reduces the unambiguous estimation range. Variational quantum interferometers enhance precision…

量子物理 · 物理学 2026-05-26 Qingchuan Yang , Xianing Feng , Lianfu Wei

Purpose: Development of a generic model-based reconstruction framework for multi-parametric quantitative MRI that can be used with data from different pulse sequences. Methods: Generic nonlinear model-based reconstruction for quantitative…

医学物理 · 物理学 2023-07-21 Nick Scholand , Xiaoqing Wang , Volkert Roeloffs , Sebastian Rosenzweig , Martin Uecker

We present an effective method for the matching of multimodal images. Accurate image matching is the basis of various applications, such as image registration and structure from motion. Conventional matching methods fail when handling noisy…

计算机视觉与模式识别 · 计算机科学 2023-03-01 Zhongli Fan , Li Zhang , Yuxuan Liu

Multi-spectral quantitative phase imaging (MS-QPI) is a cutting-edge label-free technique to determine the morphological changes, refractive index variations and spectroscopic information of the specimens. The bottleneck to implement this…

Deep convolutional neural networks trained on large datsets have emerged as an intriguing alternative for compressing images and solving inverse problems such as denoising and compressive sensing. However, it has only recently been realized…

机器学习 · 计算机科学 2019-07-09 Reinhard Heckel

Dynamic magnetic resonance imaging (DMRI) is an effective imaging tool for diagnosis tasks that require motion tracking of a certain anatomy. To speed up DMRI acquisition, k-space measurements are commonly undersampled along spatial or…

图像与视频处理 · 电气工程与系统科学 2023-09-20 Di Xu , Hengjie Liu , Dan Ruan , Ke Sheng

Background: Quantitative susceptibility mapping (QSM) of the brain is an advanced MRI technique for assessing tissue characteristics based on magnetic susceptibility, which varies with the composition of the tissue, such as iron, calcium,…

We propose and test the Direct Waveform Inversion (DWI) scheme to simultaneously invert for layered velocity and density profiles, using reflection seismic waveforms recorded on the surface. The recorded data include primary reflections and…

地球物理 · 物理学 2021-08-10 Zhonghan Liu , Yingcai Zheng , Hua-Wei Zhou

Locally Rotation Invariant (LRI) operators have shown great potential in biomedical texture analysis where patterns appear at random positions and orientations. LRI operators can be obtained by computing the responses to the discrete…

计算机视觉与模式识别 · 计算机科学 2020-06-03 Valentin Oreiller , Vincent Andrearczyk , Julien Fageot , John O. Prior , Adrien Depeursinge

Reconstructing magnetization in nanoscale magnetic thin films is essential for developing next-generation memory, sensors, and various spintronic technologies. However, this remains challenging due to the ill-posed nature of the stray field…

无序系统与神经网络 · 物理学 2026-04-28 Zander Scholl , Justin Woods , Charudatta Phatak , Hanu Arava

We present the Deep Picard Iteration (DPI) method, a new deep learning approach for solving high-dimensional partial differential equations (PDEs). The core innovation of DPI lies in its use of Picard iteration to reformulate the typically…

数值分析 · 数学 2025-07-08 Jiequn Han , Wei Hu , Jihao Long , Yue Zhao

Quantitative susceptibility mapping (QSM) is a valuable MRI post-processing technique that quantifies the magnetic susceptibility of body tissue from phase data. However, the traditional QSM reconstruction pipeline involves multiple…

图像与视频处理 · 电气工程与系统科学 2022-06-27 Yang Gao , Zhuang Xiong , Amir Fazlollahi , Peter J Nestor , Viktor Vegh , Fatima Nasrallah , Craig Winter , G. Bruce Pike , Stuart Crozier , Feng Liu , Hongfu Sun

Unsupervised and supervised learning methods conventionally use kernels to capture nonlinearities inherent in data structure. However experts have to ensure their proposed nonlinearity maximizes variability and capture inherent diversity of…

机器学习 · 计算机科学 2025-07-30 Mojtaba Moattari

The performance of machine learning based network intrusion detection systems (NIDSs) severely degrades when deployed on a network with significantly different feature distributions from the ones of the training dataset. In various…

密码学与安全 · 计算机科学 2023-05-15 Siamak Layeghy , Mahsa Baktashmotlagh , Marius Portmann

We present Curve Distillation, CuDi, for efficient and controllable exposure adjustment without the requirement of paired or unpaired data during training. Our method inherits the zero-reference learning and curve-based framework from an…

计算机视觉与模式识别 · 计算机科学 2022-07-29 Chongyi Li , Chunle Guo , Ruicheng Feng , Shangchen Zhou , Chen Change Loy

We introduce the Weak-form Estimation of Nonlinear Dynamics (WENDy) method for estimating model parameters for non-linear systems of ODEs. Without relying on any numerical differential equation solvers, WENDy computes accurate estimates and…

机器学习 · 计算机科学 2023-11-27 David M. Bortz , Daniel A. Messenger , Vanja Dukic

Although deep learning (DL) methods are powerful for solving inverse problems, their reliance on high-quality training data is a major hurdle. This is significant in high-dimensional (dynamic/volumetric) magnetic resonance imaging (MRI),…

图像与视频处理 · 电气工程与系统科学 2024-05-24 Frederic Wang , Han Qi , Alfredo De Goyeneche , Reinhard Heckel , Michael Lustig , Efrat Shimron

An accurate velocity model is essential to make a good seismic image. Conventional methods to perform Velocity Model Building (VMB) tasks rely on inverse methods, which, despite being widely used, are ill-posed problems that require intense…