Results 31 to 40 of about 7,719 (190)

Distinct Brain Drivers and Shared Cerebello–Cortical Input in ADCY5 and SGCE Hyperkinetic Movements

Movement Disorders, EarlyView.
Resting‐state fMRI and effective connectivity revealed distinct cerebellar–basal ganglia–cortical interactions in ADCY5 (MxMD‐ADCY5) and SGCE (MYC/DYT‐SGCE) related movement disorders. The cerebellum modulated cortex directly in MYC/DYT‐SGCE, but indirectly via basal ganglia‐cerebellar projections in MxMD‐ADCY5, which also showed reduced subthalamic ...
Clément Tarrano, Cécile Galléa, Asya Ekmen, Cécile Delorme, Eavan M. McGovern, Quentin Salardaine, Lina Daghsen, Manon Gomes, Vanessa Brochard, Eoin Mulroy, Kailash P. Bhatia, Carlo Fusco, Miryam Carecchio, Norbert Brüggemann, Alexander Münchau, Victoria Gonzalez, Diane Doummar, Christine Tranchant, Mathieu Anheim, Philippe Damier, Florence Riant, Mohamed Doulazmi, Agathe Roubertie, Caroline Dubacq, Oriane Trouillard, Romain Valabregue, Mélanie Didier, Benoit Beranger, Pierre Pouget, Marie Vidailhet, Sabine Meunier, Aurélie Méneret, Yulia Worbe, Emmanuel Roze   +33 more
wiley   +1 more source

Epi-convergent discretizations of stochastic programs via integration quadratures

, 2003
Modern integration quadratures are designed to produce finitely supported approximations of a given (probability) measure. This makes them well suited for discretization of stochastic programs. We give conditions that guarantee the epi-convergence of resulting objectives to the original one.
Pennanen, Teemu, Koivu, Matti
openaire   +2 more sources

Field‐Based Spatial Self‐Registration of Multicoil Hardware for B0 Field Control

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop and validate a magnetic field‐based method for self‐registration of multicoil (MC) shim hardware in MRI systems, enabling accurate B0 field control despite nonreproducible hardware placement between calibration and experimental sessions.
Isabelle Zinghini, Ian Macleod, Carlotta Ianniello, Sebastian Theilenberg, Christoph Juchem   +4 more
wiley   +1 more source

Four Directions, One Solution: Enabling Rapid Diffusion Tensor MRI for Ultra‐Low Field Using Deep Learning

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose This study revisits the tetrahedral encoding strategy originally proposed to accelerate Diffusion Tensor Magnetic Resonance Imaging (DT‐MRI) by reducing the requisite number of diffusion‐weighted measurements to four. We examine its practical limitations and explore how artificial intelligence (AI) can extend its utility. Specifically,
Joshua Mawuli Ametepe, James Gholam, Leandro Beltrachini, Mara Cercignani, Derek Kenton Jones   +4 more
wiley   +1 more source

Inter‐Shot Motion Correction of Segmented 3D‐GRASE ASL Perfusion Imaging With Self‐Navigation and CAIPI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Segmented 3D Gradient and Spin Echo (GRASE) is commonly used in Arterial Spin Labeling (ASL) perfusion imaging. However, it is vulnerable to inter‐shot motion, leading to subtraction errors that cannot be corrected. We developed a retrospective self‐navigated inter‐shot motion correction method for segmented 3D‐GRASE ASL imaging with ...
Minhao Hu, Frederik J. Lange, Peter Jezzard, Joseph G. Woods, Mark Chiew, Thomas W. Okell   +5 more
wiley   +1 more source

Nonlinear Elliptic Equations Involving Critical Sobolev Exponents: Asymptotic Analysis via Methods of Epi-Convergence

Zeitschrift für Analysis und ihre Anwendungen, 1994
We study the minimizers of two functionals involving critical Sobolev exponents, and whose Euler equations lead to nonlinear boundary value problems. We first employ classical methods to obtain estimates. We then rephrase the problems in a more abstract functional analytical setting.
Bandle, C., Brillard, A.
openaire   +2 more sources

Multiecho Fat‐Water Spiral MR Elastography With Distributed Encoding for Simultaneously Imaging Brain and Skull Displacement

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To introduce a novel multiecho, multishot spiral MR elastography (MRE) sequence to image brain and skull displacement simultaneously using a joint fat‐water image reconstruction and distributed motion encoding. Methods Multiple echo times were implemented into a high‐resolution multishot spiral MRE sequence to capture water‐based brain
Alexa M. Diano, Alex M. Cerjanic, Olivia M. Bailey, Mary K. Kramer, Joy Mojumder, Ruth J. Okamoto, Philip V. Bayly, Dzung L. Pham, Curtis L. Johnson   +8 more
wiley   +1 more source

Collaborative Reconstruction of PROPELLER‐EPI Data Using POCSMUSE (CORPUSE) for High‐Fidelity Diffusion MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a reconstruction framework for DW‐PROPELLER‐EPI that improves image quality and SNR efficiency under per‐blade acceleration while minimizing EPI‐related artifacts, enabling high‐resolution diffusion‐tensor imaging (DTI) with fewer blades.
Hailin Xiong, Liyuan Liang, Shihui Chen, Yi Li, Chenglang Yuan, Tianbaige Liu, Xiaorui Xu, Hing‐Chiu Chang   +7 more
wiley   +1 more source

Ideal epi-convergence of sequences of functions

Filomat
There are many definitions of epi-convergence in the literature. These definitions can be categorized as sequential, topological and epigraphical. In this paper, we will first give the epigraphical definition of ideal epi-convergence, and from this definition we will derive other definitions.
openaire   +2 more sources

Asymptotic analysis of incompressible and viscous fluid flow through porous media. Brinkman's law via epi-convergence methods [PDF]

Annales de la Faculté des sciences de Toulouse : Mathématiques, 1987
The asymptotic behaviour, when \(\in\) converges to 0, of a viscous and incompressible fluid, slowly flowing in a porous medium containing an \(\in\)-periodic distribution of identical inclusions of size \(r_{\in}\) \((\lim_{\in \to 0}(r_{\in}/\in)=0)\), is described. An improved justification of Brinkman's law is obtained, via epi-convergence methods.
openaire   +2 more sources