Results 81 to 90 of about 2,325,569 (208)
Journal of Ultrasound in Medicine, EarlyView.Purpose To describe a reproducible ultrasound–magnetic resonance imaging (MRI) fusion imaging technique developed for quantitative assessment of carotid wall strain and plaque morphology. Methods MRI volumes (Oblique T2 Cube) were imported into the Sequoia ultrasound system equipped with an electromagnetic tracking module.
Maxwell J. Kiernan +10 more
wiley +1 more source
Environment International, 2018 This commentary addresses the paper by Vila et al. entitled “Occupational exposure to high-frequency electromagnetic fields and brain tumor risk in the INTEROCC study: An individualized assessment approach” that is published in Environment International.
S.M.J. Mortazavi
doaj +1 more source
Optimal Transmission Performance of Quadrature Wireless Resonators at 3 T
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To demonstrate a method for optimizing the efficiency of wireless resonators using tailored excitation from a dual‐transmit birdcage coil (BC), and to present the design and experimental investigation of a quadrature resonator for 3 T breast MRI application.
Leila Sharipova +7 more
wiley +1 more source
, 2015 Basic characteristics of electromagnetic fields in the microwave, radiofrequency, and extremely low frequency ranges and their interactions with biological tissues are introduced, and parameters such as polarization and specific absorption rate used for ...
Jeffrey W Hand
core +1 more source
Systematic Review of the Exposure Assessment and Epidemiology of High-Frequency Voltage Transients
Frontiers in Public Health, 2016 Conclusions of epidemiological studies describing adverse health effects as a result of exposure to electromagnetic fields are not unanimous and often contradictory. It has been proposed that an explanation could be that high frequency voltage transients
Frank eDe Vocht, Robert G Olsen
doaj +1 more source
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Ultra‐high field (≥ 7 T) and 3 T MRI suffer from B1+ inhomogeneity and signal loss. Conventional metasurfaces that mitigate B1+ inhomogeneity and improve image SNR are “fixed” in nature and designed for a single Larmor frequency. This study demonstrates the feasibility of an adaptive metasurface utilizing voltage‐controlled capacitors ...
Paul S. Jacobs +7 more
wiley +1 more source
Cancers of the Brain and CNS: Global Patterns and Trends in Incidence
Journal of Biomedical Physics and Engineering, 2018 Miranda-Filho et al. in their recently published paper entitled “Cancers of the brain and CNS: global patterns and trends in incidence” provided a global status report of the geographic and temporal variations in the incidence of brain and CNS cancers in
Mortazavi S. M. J. +2 more
doaj +1 more source
Effect of Radiofrequency Electromagnetic Field on Human DNA
Defence Science Journal, 2006 Biological effect of radiofrequency electromagnetic radiation on the human genome has been a cause of growing concern owing to its increased application. In the present paper, effect of radiofrequency electromagnetic radiation on deoxyribonucleic acid (DNA) of the personnel working near/in radiofrequency electromagnetic radiation environment (radar ...
Soma Sarkar, Babita Kumari, Sher Ali
openaire +1 more source
Combined Metasurface and Metamaterial Passive Transmit Lens and Receive Array for 3 T
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Metasurfaces (MSs) and metamaterials (MMs) can reduce transmit field nulls caused by wavelength effects at higher MR field strengths. We present a layered MM and MS resonant structure that improves transmit field performance when used as a combined slab (i.e., the metaslab), while also operating as a receive array.
Adam M. Maunder +4 more
wiley +1 more source
Theory of electromagnetic fields
, 2010 We discuss the theory of electromagnetic fields, with an emphasis on aspects relevant to radiofrequency systems in particle accelerators. We begin by reviewing Maxwell's equations and their physical significance.
Andrzej Wolski, Wolski, Andrzej
core +1 more source