Transverse slot antennas for high field MRI

Leeor Alon; Riccardo Lattanzi; Karthik Lakshmanan; Ryan Brown; Cem M. Deniz; Daniel K. Sodickson; Christopher M. Collins

doi:10.1002/mrm.27095

Transverse slot antennas for high field MRI

Leeor Alon, Riccardo Lattanzi, Karthik Lakshmanan, Ryan Brown, Cem M. Deniz, Daniel K. Sodickson, Christopher M. Collins

Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Purpose: Introduce a novel coil design using an electrically long transversely oriented slot in a conductive sheet. Theory and Methods: Theoretical considerations, numerical simulations, and experimental measurements are presented for transverse slot antennas as compared with electric dipole antennas. Results: Simulations show improved central and average transmit and receive efficiency, as well as larger coverage in the transverse plane, for a single slot as compared to a single dipole element. Experiments on a body phantom confirm the simulation results for a slot antenna relative to a dipole, demonstrating a large region of relatively high sensitivity and homogeneity. Images in a human subject also show a large imaging volume for a single slot and six slot antenna array. High central transmit efficiency was observed for slot arrays relative to dipole arrays. Conclusion: Transverse slots can exhibit improved sensitivity and larger field of view compared with traditional conductive dipoles. Simulations and experiments indicate high potential for slot antennas in high field MRI. Magn Reson Med 80:1233–1242, 2018.

Original language	English (US)
Pages (from-to)	1233-1242
Number of pages	10
Journal	Magnetic resonance in medicine
Volume	80
Issue number	3
DOIs	https://doi.org/10.1002/mrm.27095
State	Published - Sep 2018

Keywords

RF antennas
coil arrays
high field MRI
slot antenna

ASJC Scopus subject areas

Radiology Nuclear Medicine and imaging

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10.1002/mrm.27095

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title = "Transverse slot antennas for high field MRI",

abstract = "Purpose: Introduce a novel coil design using an electrically long transversely oriented slot in a conductive sheet. Theory and Methods: Theoretical considerations, numerical simulations, and experimental measurements are presented for transverse slot antennas as compared with electric dipole antennas. Results: Simulations show improved central and average transmit and receive efficiency, as well as larger coverage in the transverse plane, for a single slot as compared to a single dipole element. Experiments on a body phantom confirm the simulation results for a slot antenna relative to a dipole, demonstrating a large region of relatively high sensitivity and homogeneity. Images in a human subject also show a large imaging volume for a single slot and six slot antenna array. High central transmit efficiency was observed for slot arrays relative to dipole arrays. Conclusion: Transverse slots can exhibit improved sensitivity and larger field of view compared with traditional conductive dipoles. Simulations and experiments indicate high potential for slot antennas in high field MRI. Magn Reson Med 80:1233–1242, 2018.",

keywords = "RF antennas, coil arrays, high field MRI, slot antenna",

author = "Leeor Alon and Riccardo Lattanzi and Karthik Lakshmanan and Ryan Brown and Deniz, {Cem M.} and Sodickson, {Daniel K.} and Collins, {Christopher M.}",

note = "Funding Information: Research was supported by NIH grants. Cofounders of RF Test Labs Received 24 April 2017; revised 28 December 2017; accepted 28 December 2017 DOI 10.1002/mrm.27095 Published online 1 February 2018 in Wiley Online Library (wileyonlinelibrary. com). VC 2018 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. Publisher Copyright: {\textcopyright} 2018 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine",

year = "2018",

month = sep,

doi = "10.1002/mrm.27095",

language = "English (US)",

volume = "80",

pages = "1233--1242",

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AU - Alon, Leeor

AU - Lattanzi, Riccardo

AU - Lakshmanan, Karthik

AU - Brown, Ryan

AU - Deniz, Cem M.

AU - Sodickson, Daniel K.

AU - Collins, Christopher M.

N1 - Funding Information: Research was supported by NIH grants. Cofounders of RF Test Labs Received 24 April 2017; revised 28 December 2017; accepted 28 December 2017 DOI 10.1002/mrm.27095 Published online 1 February 2018 in Wiley Online Library (wileyonlinelibrary. com). VC 2018 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. Publisher Copyright: © 2018 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine

PY - 2018/9

Y1 - 2018/9

N2 - Purpose: Introduce a novel coil design using an electrically long transversely oriented slot in a conductive sheet. Theory and Methods: Theoretical considerations, numerical simulations, and experimental measurements are presented for transverse slot antennas as compared with electric dipole antennas. Results: Simulations show improved central and average transmit and receive efficiency, as well as larger coverage in the transverse plane, for a single slot as compared to a single dipole element. Experiments on a body phantom confirm the simulation results for a slot antenna relative to a dipole, demonstrating a large region of relatively high sensitivity and homogeneity. Images in a human subject also show a large imaging volume for a single slot and six slot antenna array. High central transmit efficiency was observed for slot arrays relative to dipole arrays. Conclusion: Transverse slots can exhibit improved sensitivity and larger field of view compared with traditional conductive dipoles. Simulations and experiments indicate high potential for slot antennas in high field MRI. Magn Reson Med 80:1233–1242, 2018.

AB - Purpose: Introduce a novel coil design using an electrically long transversely oriented slot in a conductive sheet. Theory and Methods: Theoretical considerations, numerical simulations, and experimental measurements are presented for transverse slot antennas as compared with electric dipole antennas. Results: Simulations show improved central and average transmit and receive efficiency, as well as larger coverage in the transverse plane, for a single slot as compared to a single dipole element. Experiments on a body phantom confirm the simulation results for a slot antenna relative to a dipole, demonstrating a large region of relatively high sensitivity and homogeneity. Images in a human subject also show a large imaging volume for a single slot and six slot antenna array. High central transmit efficiency was observed for slot arrays relative to dipole arrays. Conclusion: Transverse slots can exhibit improved sensitivity and larger field of view compared with traditional conductive dipoles. Simulations and experiments indicate high potential for slot antennas in high field MRI. Magn Reson Med 80:1233–1242, 2018.

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Transverse slot antennas for high field MRI

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