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In this paper, we take a step towards developing efficient hard thresholding methods for low-rank tensor recovery from memory-efficient linear measurements with tensorial structure. Theoretical guarantees for many standard iterative…

数值分析 · 数学 2025-02-06 Shambhavi Suryanarayanan , Elizaveta Rebrova

We present a Bayesian approach to estimate the parameters of mathematical models of cardiac electrophysiology with quantified uncertainty. Such models capture the dynamics of the electrical signal that coordinates the muscle cell…

数值分析 · 数学 2026-04-02 Maarten Volkaerts , Marie Cloet , Hans Dierckx , Piet Claus , Giovanni Samaey

In this work, we propose a time-varying wave-shape extraction algorithm based on a modified version of the adaptive non-harmonic model for non-stationary signals. The model codifies the time-varying wave-shape information in the relative…

信号处理 · 电气工程与系统科学 2023-09-28 Joaquin Ruiz , Gastón Schlotthauer , Leandro Vignolo , Marcelo A. Colominas

Electrical Impedance Tomography (EIT) is an emerging non-invasive medical imaging modality. It is based on feeding electrical currents into the patient, measuring the resulting voltages at the skin, and recovering the internal conductivity…

图像与视频处理 · 电气工程与系统科学 2020-11-06 Juan Pablo Agnelli , Aynur Çöl , Matti Lassas , Rashmi Murthy , Matteo Santacesaria , Samuli Siltanen

In this work we address the issue of validating the monodomain equation used in combination with the Bueno-Orovio ionic model for the prediction of the activation times in cardiac electro-physiology of the left ventricle. To this aim, we…

Heart is one of the vital organs of human body. A minor dysfunction of heart even for a short time interval can be fatal, therefore, efficient monitoring of its physiological state is essential for the patients with cardiovascular diseases.…

图像与视频处理 · 电气工程与系统科学 2019-11-22 Shakeel Muhammad Ibrahim , Muhammad Sohail Ibrahim , Muhammad Usman , Imran Naseem , Muhammad Moinuddin

Multi-planar tagged MRI is the gold standard for regional heart wall motion evaluation. However, accurate recovery of the 3D true heart wall motion from a set of 2D apparent motion cues is challenging, due to incomplete sampling of the true…

图像与视频处理 · 电气工程与系统科学 2024-12-10 Meng Ye , Bingyu Xin , Bangwei Guo , Leon Axel , Dimitris Metaxas

Algorithm unrolling methods have proven powerful for solving the regularized least squares problem in computational magnetic resonance imaging (MRI). These approaches unfold an iterative algorithm with a fixed number of iterations,…

图像与视频处理 · 电气工程与系统科学 2025-10-21 Junno Yun , Yaşar Utku Alçalar , Mehmet Akçakaya

Quantitative cardiac magnetic resonance T1 and T2 mapping enable myocardial tissue characterisation but the lengthy scan times restrict their widespread clinical application. We propose a deep learning method that incorporates a time…

信号处理 · 电气工程与系统科学 2023-10-02 Fanwen Wang , Michael Tanzer , Mengyun Qiao , Wenjia Bai , Daniel Rueckert , Guang Yang , Sonia Nielles-Vallespin

Motor imagery (MI) based EEG represents a frontier in enabling direct neural control of external devices and advancing neural rehabilitation. This study introduces a novel time embedding technique, termed traveling-wave based time…

神经元与认知 · 定量生物学 2024-08-26 Zhengqing Miao , Meirong Zhao

We present a deep learning model to automatically generate computer models of the human heart from patient imaging data with an emphasis on its capability to generate thin-walled cardiac structures. Our method works by deforming a template…

计算机视觉与模式识别 · 计算机科学 2024-01-05 Arjun Narayanan , Fanwei Kong , Shawn Shadden

Reconstructing cardiac motion from CMR sequences is critical for diagnosis, prognosis, and intervention. Existing methods rely on complete CMR stacks to infer full heart motion, limiting their applicability during intervention when only…

计算机视觉与模式识别 · 计算机科学 2025-11-21 Yihong Chen , Jiancheng Yang , Deniz Sayin Mercadier , Hieu Le , Juerg Schwitter , Pascal Fua

Many cognitive, sensory and motor processes have correlates in oscillatory neural sources, which are embedded as a subspace into the recorded brain signals. Decoding such processes from noisy magnetoencephalogram/electroencephalogram…

机器学习 · 计算机科学 2017-11-23 Sebastian Castaño-Candamil , Andreas Meinel , Michael Tangermann

Transcranial magnetic stimulation combined with electroencephalography (TMS-EEG) is widely used to study the reactivity and connectivity of brain regions for clinical or research purposes. The electromagnetic pulse of the TMS device…

定量方法 · 定量生物学 2019-10-30 Panteleimon Vafeidis , Vasilios K. Kimiskidis , Dimitris Kugiumtzis

This study provides a computationally effective deconvolution algorithm capable to reconstruct piled-up events in scintillating detector systems with high count rate where fully digitized waveforms are available. A fixed-point iteration…

仪器与探测器 · 物理学 2025-06-18 Georgi Georgiev

Electrical impedance tomography (EIT) is a non-invasive imaging method for recovering the internal conductivity of a physical body from electric boundary measurements. EIT combined with machine learning has shown promise for the…

A phase mapping is an approach to processing signals of electrograms recorded from the surface of cardiac tissue. The main concept of phase mapping is the application of the phase transformation with the aim to obtain signals with useful…

信号处理 · 电气工程与系统科学 2021-04-14 Konstantin Ushenin , Tatyana Nesterova , Dmitry Shmarko , Vladimir Sholokhov

One of the most significant challenges in the field of deep learning and medical image segmentation is to determine an appropriate threshold for classifying each pixel. This threshold is a value above which the model's output is considered…

图像与视频处理 · 电气工程与系统科学 2023-06-28 Ali Fayzi , Mohammad Fayzi , Mostafa Forotan

Local patterns of excitation and inhibition that can generate neural waves are studied as a computational mechanism underlying the organization of neuronal tunings. Sparse coding algorithms based on networks of excitatory and inhibitory…

神经元与认知 · 定量生物学 2022-05-30 Leon Lufkin , Ashish Puri , Ganlin Song , Xinyi Zhong , John Lafferty

Multi-channel ECG-based cardiac disorders detection has an impact on cardiac care and treatment. Limitations of existing methods included variation in ECG waveforms due to the location of electrodes, high non-linearity in the signal, and…

计算机视觉与模式识别 · 计算机科学 2024-08-06 Suraj Kumar Behera , Debanjali Bhattacharya , Ninad Aithal , Neelam Sinha