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  Modeling electromagnetic exposure in humans inside a whole-body birdcage coil excited by a two-channel parallel transmitter operated at 123 MHz

Kozlov, M., Horner, M., Kainz, W., Weiskopf, N., & Möller, H. E. (2020). Modeling electromagnetic exposure in humans inside a whole-body birdcage coil excited by a two-channel parallel transmitter operated at 123 MHz. IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology. doi:10.1109/JERM.2020.2987901.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-3FCA-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-4FAE-F
Genre: Journal Article

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 Creators:
Kozlov, Mikhail1, Author              
Horner, Marc, Author
Kainz, Wolfgang, Author
Weiskopf, Nikolaus1, Author              
Möller, Harald E.2, Author              
Affiliations:
1Department Neurophysics (Weiskopf), MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_2205649              
2Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634558              

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Free keywords: Antenna arrays; Biomedical imaging; Computational electromagnetics; RF safety
 Abstract: The influence of the accuracy level for whole-body birdcage coil models on electromagnetic exposure estimations was evaluated using three anatomical human body models located at the head landmark position. Both generic and vendor-specific birdcage coil models were created and analyzed using a radio-frequency (RF) circuit and a three-dimensional electromagnetic (EM) co-simulation approach to evaluate EM properties of the coil used in a commercial 3T magnetic resonance imaging (MRI) scanner. The fidelity of the coil geometry and excitation, as well as consideration of permissible variations of the coil electrical components and capacitor losses, had a significant impact on the estimated electric field distributions inside the human models. Therefore, the variety of electric fields generated in humans should be carefully considered for a reliable RF safety assessment of a patient with a passive or active implant undergoing a scan in a modern MRI scanner with dual-channel transmit RF coils.

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Language(s): eng - English
 Dates: 2020-04-17
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1109/JERM.2020.2987901
 Degree: -

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Title: IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology
Source Genre: Journal
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Publ. Info: New York : IEEE
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 2469-7249
CoNE: https://pure.mpg.de/cone/journals/resource/2469-7249