Evaluation of a Workflow to Define Low Specific Absorption Rate MRI Protocols for Patients With Active Implantable Medical Devices
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Magnetic Resonance Imaging"
DOI: 10.1002/jmri.27044
Abstract: MRI exams for patients with MR‐conditional active implantable medical devices (AIMDs) are contraindicated unless specific conditions are met. This limits the maximum specific absorption rate (SAR, W/kg). Currently, there is no general framework to guide… read more here.
Keywords: specific absorption; active implantable; implantable medical; absorption rate ... See more keywords
On the computation and comparison of specific absorption rate (SAR) in a skin tissue using analytical and numerical methods
Sign Up to like & getrecommendations! Published in 2018 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.31345
Abstract: Specific absorption rate (SAR) is a measure of safety and a requirement for portable radio frequency devices which are regulated mainly by the standards recommended by the Institute of Electrical and Electronics Engineers (IEEE) and… read more here.
Keywords: specific absorption; analytical numerical; rate; rate sar ... See more keywords
3D‐specific absorption rate estimation from high‐intensity focused ultrasound sonications using the Green's function heat kernel
Sign Up to like & getrecommendations! Published in 2018 at "Medical Physics"
DOI: 10.1002/mp.12978
Abstract: Purpose To evaluate a numerical inverse Green's function method for deriving specific absorption rates (SARs) from high‐intensity focused ultrasound (HIFU) sonications using tissue parameters (thermal conductivity, specific heat capacity, and mass density) and three‐dimensional (3D)… read more here.
Keywords: specific absorption; temperature; green function; method ... See more keywords
Probabilistic analysis of the specific absorption rate intersubject variability safety factor in parallel transmission MRI
Sign Up to like & getrecommendations! Published in 2017 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.26468
Abstract: Specific absorption rate (SAR) calculations in parallel transmission are commonly performed by using electromagnetic simulations on generic models. In this study, we propose a probabilistic analysis to study the safety factor employed to account for… read more here.
Keywords: specific absorption; parallel transmission; safety factor; probabilistic analysis ... See more keywords
Post‐processing algorithms for specific absorption rate compression
Sign Up to like & getrecommendations! Published in 2021 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.28909
Abstract: Compression of local specific absorption rate (SAR) matrices is essential for enabling SAR monitoring and efficient pulse calculation in parallel transmission. Improvements in compression result in lower error margin and/or lower number of virtual observation… read more here.
Keywords: specific absorption; compression; post processing; absorption rate ... See more keywords
Evaluation of specific absorption rate and heating in children exposed to a 7T MRI head coil
Sign Up to like & getrecommendations! Published in 2022 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.29283
Abstract: To evaluate specific absorption rate (SAR) and temperature distributions resulting from pediatric exposure to a 7T head coil. read more here.
Keywords: specific absorption; head coil; absorption rate;
Effect of subject‐specific head morphometry on specific absorption rate estimates in parallel‐transmit MRI at 7 T
Sign Up to like & getrecommendations! Published in 2023 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.29589
Abstract: To assess the accuracy of morphing an established reference electromagnetic head model to a subject‐specific morphometry for the estimation of specific absorption rate (SAR) in 7T parallel‐transmit (pTx) MRI. read more here.
Keywords: head; specific absorption; subject specific; absorption rate ... See more keywords
Design and characterization of an eight‐element passively fed meander‐dipole array with improved specific absorption rate efficiency for 7 T body imaging
Sign Up to like & getrecommendations! Published in 2019 at "Nmr in Biomedicine"
DOI: 10.1002/nbm.4106
Abstract: To evaluate the transmit efficiency and specific absorption rate (SAR) efficiency of a new eight‐element passively fed meander‐dipole antenna array designed for body MRI at 7 T, and to compare these values with a conventional… read more here.
Keywords: meander dipole; array; fed meander; specific absorption ... See more keywords
Influence of 1 GHz radiation at low specific absorption rate of energy deposition on plant mitotic division process
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Environmental Science and Technology"
DOI: 10.1007/s13762-017-1490-0
Abstract: The biological impact of microwaves exposure on biosphere is presently an important research subject. With the significant increase of communications technology use, of industrial and military activities which involve radiofrequency radiation, electromagnetic pollution became very… read more here.
Keywords: specific absorption; low specific; rate energy; mitotic division ... See more keywords
Enhanced specific absorption rate of bi-magnetic nanoparticles for heating applications
Sign Up to like & getrecommendations! Published in 2017 at "Materials Chemistry and Physics"
DOI: 10.1016/j.matchemphys.2016.12.009
Abstract: Abstract Truncated octahedron bi-magnetic core/shell nanoparticles of Zn 0.4 Co 0.6 Fe 2 O 4 @Zn 0.4 Mn 0.6 Fe 2 O 4 with different size distributions have been synthesized, and their structural and magnetic… read more here.
Keywords: specific absorption; absorption rate; core shell;
Evaluating the effects of receive-only arrays in specific absorption rate simulations at 3 and 7 T.
Sign Up to like & getrecommendations! Published in 2018 at "Magnetic resonance imaging"
DOI: 10.1016/j.mri.2018.06.011
Abstract: Specific absorption rate (SAR) simulations are performed for most clinical and research transmit coil configurations. Such simulations allow the determination of limits in transmit power for patient safety. Different human models and coil configurations have… read more here.
Keywords: specific absorption; absorption rate; evaluating effects; receive arrays ... See more keywords