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A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla
In this letter, we evaluate antenna designs for ultra-high frequency and field (UHF) human brain magnetic resonance imaging (MRI) at 10.5 tesla (T). Although MRI at such UHF is expected to provide major signal-to-noise gains, the frequency of interest, 447 MHz, presents us with challenges regarding...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10072856/ https://www.ncbi.nlm.nih.gov/pubmed/37020750 http://dx.doi.org/10.1109/lawp.2022.3183206 |
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author | Woo, Myung Kyun DelaBarre, Lance Waks, Matt Lagore, Russell Radder, Jerahmie Jungst, Steve Kang, Chang-Ki Ugurbil, Kamil Adriany, Gregor |
author_facet | Woo, Myung Kyun DelaBarre, Lance Waks, Matt Lagore, Russell Radder, Jerahmie Jungst, Steve Kang, Chang-Ki Ugurbil, Kamil Adriany, Gregor |
author_sort | Woo, Myung Kyun |
collection | PubMed |
description | In this letter, we evaluate antenna designs for ultra-high frequency and field (UHF) human brain magnetic resonance imaging (MRI) at 10.5 tesla (T). Although MRI at such UHF is expected to provide major signal-to-noise gains, the frequency of interest, 447 MHz, presents us with challenges regarding improved B(1)(+) efficiency, image homogeneity, specific absorption rate (SAR), and antenna element decoupling for array configurations. To address these challenges, we propose the use of both monopole and dipole antennas in a novel hybrid configuration, which we refer to as a mono-dipole hybrid antenna (MDH) array. Compared to an 8-channel dipole antenna array of the same dimensions, the 8-channel MDH array showed an improvement in decoupling between adjacent array channels, as well as ~18% higher B(1)(+) and SAR efficiency near the central region of the phantom based on simulation and experiment. However, the performances of the MDH and dipole antenna arrays were overall similar when evaluating a human model in terms of peak B(1)(+) efficiency, 10 g SAR, and SAR efficiency. Finally, the concept of an MDH array showed an advantage in improved decoupling, SAR, and B(1)(+) near the superior region of the brain for human brain imaging. |
format | Online Article Text |
id | pubmed-10072856 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
record_format | MEDLINE/PubMed |
spelling | pubmed-100728562023-04-04 A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla Woo, Myung Kyun DelaBarre, Lance Waks, Matt Lagore, Russell Radder, Jerahmie Jungst, Steve Kang, Chang-Ki Ugurbil, Kamil Adriany, Gregor IEEE Antennas Wirel Propag Lett Article In this letter, we evaluate antenna designs for ultra-high frequency and field (UHF) human brain magnetic resonance imaging (MRI) at 10.5 tesla (T). Although MRI at such UHF is expected to provide major signal-to-noise gains, the frequency of interest, 447 MHz, presents us with challenges regarding improved B(1)(+) efficiency, image homogeneity, specific absorption rate (SAR), and antenna element decoupling for array configurations. To address these challenges, we propose the use of both monopole and dipole antennas in a novel hybrid configuration, which we refer to as a mono-dipole hybrid antenna (MDH) array. Compared to an 8-channel dipole antenna array of the same dimensions, the 8-channel MDH array showed an improvement in decoupling between adjacent array channels, as well as ~18% higher B(1)(+) and SAR efficiency near the central region of the phantom based on simulation and experiment. However, the performances of the MDH and dipole antenna arrays were overall similar when evaluating a human model in terms of peak B(1)(+) efficiency, 10 g SAR, and SAR efficiency. Finally, the concept of an MDH array showed an advantage in improved decoupling, SAR, and B(1)(+) near the superior region of the brain for human brain imaging. 2022-09 2022-06-15 /pmc/articles/PMC10072856/ /pubmed/37020750 http://dx.doi.org/10.1109/lawp.2022.3183206 Text en https://creativecommons.org/licenses/by/4.0/This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Woo, Myung Kyun DelaBarre, Lance Waks, Matt Lagore, Russell Radder, Jerahmie Jungst, Steve Kang, Chang-Ki Ugurbil, Kamil Adriany, Gregor A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla |
title | A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla |
title_full | A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla |
title_fullStr | A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla |
title_full_unstemmed | A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla |
title_short | A Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla |
title_sort | monopole and dipole hybrid antenna array for human brain imaging at 10.5 tesla |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10072856/ https://www.ncbi.nlm.nih.gov/pubmed/37020750 http://dx.doi.org/10.1109/lawp.2022.3183206 |
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