Results 101 to 110 of about 3,346 (191)
Efficacy of Optically Pumped Magnetometers in Detecting Activity From the Cerebellar Cortex
Human Brain Mapping, Volume 47, Issue 5, 1 April 2026.We studied the utility of OPMs and conventional SQUID sensors in detecting cerebellar activity. Our results indicate clear benefits for OPMs in terms of sensitivity, lead‐field correlations between the cortex and the cerebellum, and total information, with these improvements already achievable with 102 triaxial OPM sensors covering the whole head ...
Santtu Roos +2 more
wiley +1 more source
Small, Volume 22, Issue 21, 13 April 2026.A spray‐drying‐based synthesis enables the formation of zinc ferrite nanoparticles with customizable induction heating from room temperature to 250°C by varying the zinc content and postsynthesis annealing temperatures. The aqueous dispersions are colloidally stable and heat up to biologically relevant thresholds. Hence, this approach offers a scalable
Leoni Luthardt +7 more
wiley +1 more source
Optically pumped alkali magnetometers for biomedical applications [PDF]
Europhysics News, 2012 20 Optically pumped atomic magnetometers measure the Larmor frequency νL at which the bulk magnetization of a spin-polarized alkali metal vapour in a glass cell precesses around the field of interest B → 0. The precession frequency is related to the modulus of the magnetic field by νL=(γ/2π)|B → 0|, where γ/2π≈3.5Hz/nT for 133Cs, so that the magnetic ...
openaire +1 more source
NeuroImageRecent advancements in optically pumped magnetometer magnetoencephalography (OPM-MEG) make it a promising alternative to conventional SQUID-MEG systems.
Wei Xu +5 more
doaj +1 more source
A Novel Strategy for Improving the Aeromagnetic Compensation Performance of Helicopters
Sensors, 2018 An aeromagnetic survey is an important method in magnetic anomaly detection and geophysical prospecting. The magnetic field is typically measured by optically pumped magnetometers (OPM) installed on the aircraft.
Luzhao Chen +4 more
doaj +1 more source
A plateau in the sensitivity of a compact optically pumped atomic magnetometer
AIP Advances, 2014 In a compact optically pumped atomic magnetometer (OPAM), there is a plateau in the sensitivity where the dependence of the sensitivity on pumping power is small compared with that predicted by the uniform polarization model. The mechanism that generates
Natsuhiko Mizutani +5 more
doaj +1 more source
High-Temperature Alkali Vapor Cells with Anti-Relaxation Surface Coatings
, 2009 Antirelaxation surface coatings allow long spin relaxation times in alkali-metal cells without buffer gas, enabling faster diffusion of the alkali atoms throughout the cell and giving larger signals due to narrower optical linewidths.
Corney A., M. V. Romalis, S. J. Seltzer
core +1 more source
Development of an optical cardio-magnetometer [PDF]
, 2006 Diese Arbeit beschreibt die Entwicklung eines neuen Typs von Kardiomagnetometer, d.h. eines Geräts mit dem man das Magnetfeld des schlagenden menschlichen Herzens messen kann.
Bison, Georg +3 more
core
Magneto-optical rotation and cross-phase modulation via coherently driven tripod atoms
, 2004 We study the interaction of a weak probe field, having two orthogonally polarized components, with an optically dense medium of four-level atoms in a tripod configuration.
A. Messiah +7 more
core +1 more source
Beyond sensitivity: what are the enabling opportunities of OPM-MEG?
Frontiers in Medical TechnologyWhile optically-pumped magnetometer (OPM) technology offers a number of compelling advantages over its SQUID predecessor for magnetoencephalography (MEG), many studies and viewpoints focus on issues of (i) scalp placement, with commensurate increases in ...
Timothy P. L. Roberts +5 more
doaj +1 more source