Results 101 to 110 of about 41,195 (241)

NIR/VIS Dual‐Comb Spectroscopy Comparing High and Low Repetition Rate Regimes

Laser &Photonics Reviews, EarlyView.
This work compares dual‐comb spectroscopy at lower and higher repetition rates, emphasizing the inherent trade‐off between spectral and temporal resolution. The 80 MHz system provides high‐resolution spectra suitable for analyzing complex molecular structures, whereas the free‐running 1 GHz platform enables fast measurements for real‐time trace gas ...
Alexander Eber, Mithun Pal, Lukas Fürst, Emily Hruska, Christoph Gruber, Marcus Ossiander, Birgitta Bernhardt   +6 more
wiley   +1 more source

Pallidal Evoked Resonant Neural Activity as a Candidate Biomarker for Deep Brain Stimulation in Dystonia

Movement Disorders, EarlyView.
Abstract Background Deep brain stimulation (DBS) targeted to the globus pallidus (GP) can effectively alleviate dystonia symptoms. However, identifying optimal therapeutic stimulation parameters is challenging due to the manual programming process and the paucity of acute effects of DBS on dystonia symptoms.
Kara A. Johnson, Patricia B. Coutinho, Filipe P. Sarmento, Elizabeth Vo, Joshua K. Wong, Justin D. Hilliard, Kelly D. Foote, Coralie de Hemptinne   +7 more
wiley   +1 more source

Modulation of Non‐Rhythmic Temporal Prediction by Subthalamic Nucleus Deep Brain Stimulation (STN‐DBS) in Parkinson's Disease

Movement Disorders, EarlyView.
Background Accurate temporal prediction, essential for adaptive motor behavior, relies on corticobasal ganglia circuits. In Parkinson's disease (PD), both motor and non‐motor functions are impaired. Deep brain stimulation (DBS) of the subthalamic nucleus (STN) effectively alleviates motor symptoms, but its effects on non‐motor domains, like temporal ...
Rebecca Burke, Marleen J. Schoenfeld, Christian K.E. Moll, Alessandro Gulberti, Monika Pötter‐Nerger, Andreas K. Engel   +5 more
wiley   +1 more source

Impact of Partial Echo on 4D Flow MRI: The Insight From Synthetic MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The aim of this study is to investigate the impact of the partial echo on 4D flow MRI sequences thanks to in silico coupled MRI‐CFD (computational fluid dynamics) simulations. Methods Two sequences are studied: one with a full echo (FE) and another using partial echo (PE) with an echo symmetry fraction of 0.75.
Morgane Garreau, Thomas Puiseux, Ramiro Moreno, Solenn Toupin, Daniel Giese, Franck Nicoud, Simon Mendez   +6 more
wiley   +1 more source

Calibration‐Free GRAPE pTx Pulses for Homogeneous Spatial‐Selective Excitation at 7T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Extend the universal pulse GRAPE formalism to pulses with a defined spectral response, and apply the concept to spatial selection. Methods We added Bloch simulations at several frequencies for each voxel to the pulse calculation to create universal spectrally‐selective GRAPE pulses.
Daniel Löwen, Eberhard D. Pracht, Marten Veldmann, Vincent Gras, Franck Mauconduit, Nicolas Boulant, Tony Stöcker   +6 more
wiley   +1 more source

Ultrafast Blood T1 Measurement Using Golden Angle Rotated Spiral k‐t Sparse Parallel Imaging (GASSP): Evaluations in Both Pre‐ and Post‐Contrast Conditions

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Blood T1 is a key parameter for hemodynamic quantification in both non‐contrast‐ and contrast‐enhanced imaging. Individual vessel T1 has been measured using a modified Look–Locker scheme with multi‐shot EPI or FLASH in high spatial resolution, requiring ∼1 min.
Zechen Xu, Feng Xu, Qin Qin, Dan Zhu
wiley   +1 more source

Optimizing self-organized study orders: combining refutations and metacognitive prompts improves the use of interleaved practice

npj Science of Learning
During category learning, students struggle to create an optimal study order: They often study one category at a time (i.e., blocked practice) instead of alternating between different categories (i.e., interleaved practice).
Erdem Onan, Felicitas Biwer, Roman Abel, Wisnu Wiradhany, Anique de Bruin   +4 more
doaj   +1 more source

Postexercise Lactate Clearance, T2 Relaxation, and J‐Modulation in Human Skeletal Muscle Measured With Double‐Quantum Filtered 1H MRS at 7 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose 1H MRS lactate measurements are potentially valuable for studying energy metabolism in working skeletal muscle, but some technical obstacles need to be overcome. Spectral filtering to isolate the lactate signal from overlapping lipid resonances shows promise.
Kostiantyn Repnin, Vasco Rafael Rocha dos Santos, Veronika Cap, Roberta Frass‐Kriegl, Siegfried Trattnig, Graham J. Kemp, Martin Meyerspeer   +6 more
wiley   +1 more source

Simultaneous Volumetric T1 and T2 Mapping With Blood‐ and Fat‐Suppression in Abdominal Aortic Aneurysms

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop and validate a protocol for simultaneous volumetric T1 and T2 mapping with blood‐ and fat‐suppression, and apply it to patients with abdominal aortic aneurysms (AAA) to assess tissue characteristics. Methods A spoiled gradient echo (SPGR) variable flip angle (VFA) acquisition was modified with preparation modules to suppress
Wilhelm Stehling, Myrte Wennen, Eva Aalbregt, Eric Schrauben, Pim van Ooij, Kak Khee Yeung, Aart J. Nederveen, Oliver J. Gurney‐Champion   +7 more
wiley   +1 more source

Design of Topology and Parameters of Interleaved Double Buck Single-phase Rectifier

机车电传动, 2019
The traditional single-phase rectification system is a boost system, so it requires an additional output buck link in low-voltage applications. The double buck rectifier can directly realize single-stage buck rectification, and has power decoupling ...
Jingwen AI, Qing DING, Yinghan GAO, Fen TANG, Yibing TONG   +4 more
doaj