Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI

Irena Zivkovic; Andrew Webb

doi:10.1109/ICEAA.2019.8879117

Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI

Irena Zivkovic
, Andrew Webb

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

MRI at Ultrahigh Field (UHF) is complicated by interferences that occur in the transmit field (B ₁ ⁺) as a result of the relatively short wavelength of the RF transmit field compared to the dimensions of the imaging region [1], [2]. These interferences produce areas of spatially dependent image contrasts. In order to mitigate the inhomogeneous transmit field, multichannel transmit array systems have been developed. In such a system it is possible to independently control the amplitude and/or phase of each individual element, as well as to apply different RF pulses to each channel.

Original language	English
Title of host publication	Proceedings of the 2019 21st International Conference on Electromagnetics in Advanced Applications, ICEAA 2019
Place of Publication	Granada, Spain
Publisher	IEEE Press
Number of pages	1
ISBN (Electronic)	9781728105635
DOIs	https://doi.org/10.1109/ICEAA.2019.8879117
Publication status	Published - 2019
Externally published	Yes
Event	9th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2019 - Granada, Spain Duration: 9 Sept 2019 → 13 Sept 2019

Conference

Conference	9th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2019
Country/Territory	Spain
City	Granada
Period	9/09/19 → 13/09/19

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10.1109/ICEAA.2019.8879117

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Zivkovic, I., & Webb, A. (2019). Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI. In Proceedings of the 2019 21st International Conference on Electromagnetics in Advanced Applications, ICEAA 2019 Article 8879117 IEEE Press. https://doi.org/10.1109/ICEAA.2019.8879117

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title = "Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI",

abstract = "MRI at Ultrahigh Field (UHF) is complicated by interferences that occur in the transmit field (B 1 +) as a result of the relatively short wavelength of the RF transmit field compared to the dimensions of the imaging region [1], [2]. These interferences produce areas of spatially dependent image contrasts. In order to mitigate the inhomogeneous transmit field, multichannel transmit array systems have been developed. In such a system it is possible to independently control the amplitude and/or phase of each individual element, as well as to apply different RF pulses to each channel. ",

author = "Irena Zivkovic and Andrew Webb",

year = "2019",

doi = "10.1109/ICEAA.2019.8879117",

language = "English",

booktitle = "Proceedings of the 2019 21st International Conference on Electromagnetics in Advanced Applications, ICEAA 2019",

publisher = "IEEE Press",

note = "9th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2019 ; Conference date: 09-09-2019 Through 13-09-2019",

}

Zivkovic, I & Webb, A 2019, Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI. in Proceedings of the 2019 21st International Conference on Electromagnetics in Advanced Applications, ICEAA 2019., 8879117, IEEE Press, Granada, Spain, 9th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2019, Granada, Spain, 9/09/19. https://doi.org/10.1109/ICEAA.2019.8879117

Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI. / Zivkovic, Irena; Webb, Andrew.
Proceedings of the 2019 21st International Conference on Electromagnetics in Advanced Applications, ICEAA 2019. Granada, Spain: IEEE Press, 2019. 8879117.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Zivkovic, Irena

AU - Webb, Andrew

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N2 - MRI at Ultrahigh Field (UHF) is complicated by interferences that occur in the transmit field (B 1 +) as a result of the relatively short wavelength of the RF transmit field compared to the dimensions of the imaging region [1], [2]. These interferences produce areas of spatially dependent image contrasts. In order to mitigate the inhomogeneous transmit field, multichannel transmit array systems have been developed. In such a system it is possible to independently control the amplitude and/or phase of each individual element, as well as to apply different RF pulses to each channel.

AB - MRI at Ultrahigh Field (UHF) is complicated by interferences that occur in the transmit field (B 1 +) as a result of the relatively short wavelength of the RF transmit field compared to the dimensions of the imaging region [1], [2]. These interferences produce areas of spatially dependent image contrasts. In order to mitigate the inhomogeneous transmit field, multichannel transmit array systems have been developed. In such a system it is possible to independently control the amplitude and/or phase of each individual element, as well as to apply different RF pulses to each channel.

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DO - 10.1109/ICEAA.2019.8879117

M3 - Conference contribution

BT - Proceedings of the 2019 21st International Conference on Electromagnetics in Advanced Applications, ICEAA 2019

PB - IEEE Press

CY - Granada, Spain

T2 - 9th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2019

Y2 - 9 September 2019 through 13 September 2019

ER -

Zivkovic I, Webb A. Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI. In Proceedings of the 2019 21st International Conference on Electromagnetics in Advanced Applications, ICEAA 2019. Granada, Spain: IEEE Press. 2019. 8879117 doi: 10.1109/ICEAA.2019.8879117

Design and characterization of passively-fed dipole arrays with improved specific absorption rate efficiency and reduced loading effects for ultra-high field MRI

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