Results 61 to 70 of about 9,665 (208)

A Numerical Alternative to MR Thermometry for Safety Validation of Multi‐Channel RF Transmit Coils

Magnetic Resonance in Medicine, Volume 96, Issue 1, Page 469-484, July 2026.
ABSTRACT Purpose This study proposes a numerical technique to estimate peak local specific absorption rate (SAR) uncertainty of multi‐channel RF coils during the process of safety validation as an alternative to experimental temperature and electric‐field measurements, and demonstrates its use to enable human studies at 10.5 T.
Alireza Sadeghi‐Tarakameh, Simon Schmidt, Matt Waks, Russell L. Lagore, Andrea Grant, Edward Auerbach, Lance DelaBarre, Lasse Knudsen, Christophe Lenglet, Luca Vizioli, Essa Yacoub, Gregor Adriany, Gregory J. Metzger, Kamil Ugurbil, Yigitcan Eryaman   +14 more
wiley   +1 more source

Enhanced ICMR amplifier for high CMRR biopotential recordings

2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019
This paper presents an integrated biopotential preamplifier architecture targeting applications that simultaneously require high common-mode rejection ratio (CMRR), low noise, high input common-mode range (ICMR), and current-efficiency (low Noise Efficiency Factor or NEF).
Oreggioni, Julián, Castro Lisboa, Pablo, Silveira, Fernando   +2 more
openaire   +3 more sources

Timing Is Everything: How Subtle Timing Changes in MRI Echo Planar Imaging Can Significantly Alter Mechanical Vibrations and Sound Level

Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3116-3130, June 2026.
ABSTRACT Purpose Echo‐Planar Imaging (EPI) is central to fMRI, diffusion MRI, and many dynamic clinical applications, yet rapid gradient switching induces strong mechanical vibrations, generates acoustic noise, and contributes to ghosting artifacts—effects that intensify at ultra‐high fields.
Amir Seginer, Alexander Bratch, Shahar Goren, Edna Furman‐Haran, Noam Harel, Essa Yacoub, Rita Schmidt   +6 more
wiley   +1 more source

Comparison of ultrasensitive and mass spectrometry quantification of blood-based amyloid biomarkers for Alzheimer’s disease diagnosis in a memory clinic cohort

Alzheimer’s Research & Therapy, 2023
Background Alzheimer’s disease (AD) is a complex neurodegenerative disorder with β-amyloid pathology as a key underlying process. The relevance of cerebrospinal fluid (CSF) and brain imaging biomarkers is validated in clinical practice for early ...
Christophe Hirtz, Germain U. Busto, Karim Bennys, Jana Kindermans, Sophie Navucet, Laurent Tiers, Simone Lista, Jérôme Vialaret, Laure-Anne Gutierrez, Yves Dauvilliers, Claudine Berr, Sylvain Lehmann, Audrey Gabelle   +12 more
doaj   +1 more source

Stabilization of a Fabry-Perot interferometer using a suspension-point interferometer

, 2004
A suspension-point interferometer (SPI) is an auxiliary interferometer for active vibration isolation, implemented at the suspension points of the mirrors of an interferometric gravitational wave detector.
Abbott, Abramovici, Ando, Cella, Drever, Drever, Hewitson, Ju, K. Kawabe, K. Tsubono, Kalogera, Kasahara, Kuroda, M. Ando, Mizuno, Morrison, Morrison, S. Otsuka, Tagoshi, Tsubono, Tsubono, Y. Aso   +21 more
core   +3 more sources

Colorless devices and reception techniques for polarization multiplexed communications [PDF]

, 2015
Future optical networks call for flexible, high performance and low cost coherent optical receivers. We present here several advances towards such receivers, including integrated optical couplers with ultra-broad bandwidth, as well as novel reception ...
Alonso-Ramos, C., Cheben, Pavel, Halir, Robert, Halir, Robert, Molina-Fernandez, Iñigo, Ortega-Moñux, Alejandro, Reyes-Iglesias, Pedro Jose, Sarmiento-Merenguel, Darío, Wanguemert-Perez, Juan Gonzalo   +8 more
core   +1 more source

Current-Efficient Preamplifier Architecture for CMRR Sensitive Neural Recording Applications

IEEE Transactions on Biomedical Circuits and Systems, 2018
There are neural recording applications in which the amplitude of common-mode interfering signals is several orders of magnitude higher than the amplitude of the signals of interest. This challenging situation for neural amplifiers occurs, among other applications, in neural recordings of weakly electric fish or nerve activity recordings made with cuff
Julian Oreggioni, Angel A. Caputi, Fernando Silveira   +2 more
openaire   +3 more sources

A Tree-Based Architecture for High-Performance Ultra-Low-Voltage Amplifiers

Journal of Low Power Electronics and Applications, 2022
In this paper, we introduce a novel tree-based architecture which allows the implementation of Ultra-Low-Voltage (ULV) amplifiers. The architecture exploits a body-driven input stage to guarantee a rail-to-rail input common mode range and body-diode ...
Francesco Centurelli, Riccardo Della Sala, Pietro Monsurrò, Giuseppe Scotti, Alessandro Trifiletti   +4 more
doaj   +1 more source

Investigating Emotional Reactivity in Experienced Users of Psychedelics: A Cross‐Sectional fMRI Study

Human Brain Mapping, Volume 47, Issue 5, 1 April 2026.
This cross‐sectional fMRI study compared experienced psychedelic users and matched nonusers on behavioral and neural responses to emotional facial expressions. Findings reveal neurofunctional differences between groups in emotional reactivity, highlighting both similarities and important distinctions in the long‐term effects of naturalistic versus ...
Paweł Orłowski, Aleksandra Domagalik, Michał Bola   +2 more
wiley   +1 more source

An Investigative Redesign of the ECG and EMG Signal Conditioning Circuits for Two-fault Tolerance and Circuit Improvement [PDF]

, 1991
An investigation was undertaken to make the elctrocardiography (ECG) and the electromyography (EMG) signal conditioning circuits two-fault tolerant and to update the circuitry.
Obrien, Edward M.
core   +1 more source