Results 141 to 150 of about 959,350 (322)

Near‐Infrared Soliton Crystal Generation in Silicon Resonators

Laser &Photonics Reviews, EarlyView.
Near‐infrared Kerr soliton generation in silicon is severely hindered by two‐photon and free‐carrier absorption. By combining transverse‐mode dispersion engineering with active free‐carrier extraction, monolithic silicon resonators support densely spaced, low‐noise soliton‐crystal combs spanning over 100 nm and, in a separate device, broadband ...
Yue Qin, Keyi Zhong, Yaojing Zhang, Hon Ki Tsang   +3 more
wiley   +1 more source

Bipolar Radiofrequency

, 2014
Bipolar radiofrequency (RF) utilizes symmetric and closely placed electrodes to pass RF current through a defined volume of tissue. The approach has benefits over monopolar and unipolar RF in its control.
Onder, Meltem, Eckhouse, Shimon, Meltem Onder, Shimon Eckhouse, Klaus Fritz, Fritz, Klaus   +5 more
core   +1 more source

Ion Activation Methods for Top‐Down Proteomics

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Mass spectrometry (MS) has emerged as a premier method used to characterize the sequences of proteins. Top‐down proteomics aims to capture the multiple sources of structural diversity reflected in proteins, such as those that arise from alternative RNA splicing events or the addition of post‐translational modifications. Tandem MS (i.e., MS/MS)
Jada N. Walker, Jennifer S. Brodbelt
wiley   +1 more source

Optimal‐Control 19F PROJECT Improves the Reliability of CPMG‐Derived Relaxation Rates

Magnetic Resonance in Chemistry, EarlyView.
PROJECT with seedless optimal control pulses for 19F‐based protein‐ligand interaction screenings allows for a lower error in R2 estimates than those obtained with CPMG for J‐coupled fluorine signals and is indistinguishable from CPMG when the coupling is negligible, at the price of a modest reduction in SNR.
Marco Schiavina, Enrico Luchinat, Enrico Ravera   +2 more
wiley   +1 more source

Improved Accuracy of Multidimensional Spatially‐Selective Saturation RF Pulses for Short‐Repetition‐Time Steady‐State Imaging

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To introduce and evaluate a novel RF pulse design algorithm for multi‐dimensional spatially tailored excitation that is optimized for spoiled steady‐state gradient echo MRI sequences. Methods Existing multi‐dimensional RF pulse design algorithms optimize RF and gradient waveforms using a loss function based on a single RF pulse ...
Yongli He, Douglas C. Noll, Jon‐Fredrik Nielsen   +2 more
wiley   +1 more source

OpenMRF: A Modular, Vendor‐Neutral Open‐Source Framework for Magnetic Resonance Fingerprinting Using Pulseq

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Widespread adoption and methodological advancement of magnetic resonance fingerprinting (MRF) are limited by the lack of unified, reproducible implementation frameworks and fragmented open‐source tools. To address these barriers, we introduce OpenMRF—a comprehensive Pulseq‐based solution—designed to enable standardized and transferable
Tom Griesler, Jannik Stebani, Sydney Kaplan, Ivaylo Angelov, Petra Albert, Tobias Wech, Martin Blaimer, Xiang Wang, Qingping Chen, Maxim Zaitsev, Zhibo Zhu, Qi Liu, Peter Martin, Jon‐Fredrik Nielsen, Jesse I. Hamilton, Peter Nordbeck, Nicole Seiberlich, Maximilian Gram   +17 more
wiley   +1 more source

Room-temperature nonlinear Hall effect and wireless radiofrequency rectification in Weyl semimetal TaIrTe4

Nature Nanotechnology, 2021
Dushyant Kumar, Chuang-Han Hsu, Raghav Sharma, Tay-Rong Chang, Peng Yu, Jun-Yong Wang, G. Eda, G. Liang, Hyunsoo Yang   +8 more
semanticscholar   +1 more source

Respiratory‐Resolved Isotropic 3D T1 Mapping of the Carotid Vessel Wall With B1+ Correction (CARISMAT1C)

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop, optimize, and characterize a respiratory motion‐resolved free‐running isotropic 3D carotid vessel wall T1 mapping technique named CARISMAT1C. Methods An inversion‐recovery gradient‐echo free‐running pulse sequence with interleaved double flip‐angle (2FA) was implemented, and an extended‐phase‐graph dictionary was used to ...
Isabel Montón Quesada, Céline Hirsch, Pauline Calarnou, Jean‐Baptiste Ledoux, Jérôme Yerly, Christopher W. Roy, Augustin C. Ogier, Ruud B. van Heeswijk   +7 more
wiley   +1 more source

A Rapid T1‐Independent Sequence for Cerebrospinal Fluid Water Standard Correction: Application to Improved Proton Density Mapping in Brain

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To improve brain water content measures relative to cerebrospinal fluid (CSF) by including a rapid T1‐independent sequence to correct for CSF T1 errors. Methods Proton density (PD) was estimated from a 3D multiple echo gradient echo sequence by extrapolating to TE = 0 and then correcting for T1 losses using a T1 map from 3D MP2RAGE. To
Kiarash Jalali, Nashwan Naji, Peter Seres, Alan H. Wilman   +3 more
wiley   +1 more source

Distinguishing cardiac catheter ablation energy modalities by applying natural language processing to electronic health records

Journal of Comparative Effectiveness Research
Aim: Catheter ablation is used to treat symptomatic atrial fibrillation (AF) and is performed using either cryoballoon (CB) or radiofrequency (RF) ablation.
Jamie Margetta, Alicia Sale
doaj   +1 more source