Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array

Abstract In recent years, new human magnetic resonance imaging systems operating at static magnetic fields strengths of 7 Tesla or higher have become available, providing better signal sensitivity compared with lower field strengths. However, imaging human-sized objects at such high field strength a...

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Autores principales:	Akbar Alipour, Alan C. Seifert, Bradley N. Delman, Philip M. Robson, Raj Shrivastava, Patrick R. Hof, Gregor Adriany, Zahi A. Fayad, Priti Balchandani
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/80228efeab1d46dd9c7b4f64e2ce26c6
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spelling	oai:doaj.org-article:80228efeab1d46dd9c7b4f64e2ce26c62021-12-05T12:14:30ZImprovement of magnetic resonance imaging using a wireless radiofrequency resonator array10.1038/s41598-021-02533-32045-2322https://doaj.org/article/80228efeab1d46dd9c7b4f64e2ce26c62021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02533-3https://doaj.org/toc/2045-2322Abstract In recent years, new human magnetic resonance imaging systems operating at static magnetic fields strengths of 7 Tesla or higher have become available, providing better signal sensitivity compared with lower field strengths. However, imaging human-sized objects at such high field strength and associated precession frequencies is limited due to the technical challenges associated with the wavelength effect, which substantially disturb the transmit field uniformity over the human body when conventional coils are used. Here we report a novel passive inductively-coupled radiofrequency resonator array design with a simple structure that works in conjunction with conventional coils and requires only to be tuned to the scanner’s operating frequency. We show that inductive-coupling between the resonator array and the coil improves the transmit efficiency and signal sensitivity in the targeted region. The simple structure, flexibility, and cost-efficiency make the proposed array design an attractive approach for altering the transmit field distribution specially at high field systems, where the wavelength is comparable with the tissue size.Akbar AlipourAlan C. SeifertBradley N. DelmanPhilip M. RobsonRaj ShrivastavaPatrick R. HofGregor AdrianyZahi A. FayadPriti BalchandaniNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Akbar Alipour Alan C. Seifert Bradley N. Delman Philip M. Robson Raj Shrivastava Patrick R. Hof Gregor Adriany Zahi A. Fayad Priti Balchandani Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array
description	Abstract In recent years, new human magnetic resonance imaging systems operating at static magnetic fields strengths of 7 Tesla or higher have become available, providing better signal sensitivity compared with lower field strengths. However, imaging human-sized objects at such high field strength and associated precession frequencies is limited due to the technical challenges associated with the wavelength effect, which substantially disturb the transmit field uniformity over the human body when conventional coils are used. Here we report a novel passive inductively-coupled radiofrequency resonator array design with a simple structure that works in conjunction with conventional coils and requires only to be tuned to the scanner’s operating frequency. We show that inductive-coupling between the resonator array and the coil improves the transmit efficiency and signal sensitivity in the targeted region. The simple structure, flexibility, and cost-efficiency make the proposed array design an attractive approach for altering the transmit field distribution specially at high field systems, where the wavelength is comparable with the tissue size.
format	article
author	Akbar Alipour Alan C. Seifert Bradley N. Delman Philip M. Robson Raj Shrivastava Patrick R. Hof Gregor Adriany Zahi A. Fayad Priti Balchandani
author_facet	Akbar Alipour Alan C. Seifert Bradley N. Delman Philip M. Robson Raj Shrivastava Patrick R. Hof Gregor Adriany Zahi A. Fayad Priti Balchandani
author_sort	Akbar Alipour
title	Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array
title_short	Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array
title_full	Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array
title_fullStr	Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array
title_full_unstemmed	Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array
title_sort	improvement of magnetic resonance imaging using a wireless radiofrequency resonator array
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/80228efeab1d46dd9c7b4f64e2ce26c6
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Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array

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