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  Robustness of 300MHz 8-channel dual-row transmit arrays for MRI

Kozlov, M., & Möller, H. E. (2015). Robustness of 300MHz 8-channel dual-row transmit arrays for MRI. In Proceedings of the 2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) (pp. 1-5). Piscataway: IEEE.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-4965-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-D204-4
Genre: Conference Paper

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 Creators:
Kozlov, Mikhail1, 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: Tuning; Geometry; Robustness; Magnetic resonance imaging; Radio frequency; Magnetic heads; Arrays
 Abstract: We evaluated how magnetic resonance imaging robustness depends on dual-row transmit array geometry, head size, position of a head inside the array and array tuning condition. A clear winner was not found. For overlapped arrays, different tuning conditions resulted in larger peak-to-peak variation for circular polarization excitation, but B1+ (averaged over the volume of interest) decrease was as a bit less for excitations that minimized B1+ root-mean-square inhomogeneity as compared with non-overlapped arrays. For the non-overlapped array, the safety excitation efficiency was better if the distance between the crown of the head and the end of the array was small. Decreasing the distance to the array shield resulted in improved array robustness at the cost of decreased B1+.

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Language(s): eng - English
 Dates: 2015
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1109/COMCAS.2015.7360391
 Degree: -

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Title: Proceedings of the 2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)
Source Genre: Proceedings
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Affiliations:
Publ. Info: Piscataway : IEEE
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 1 - 5 Identifier: ISBN: 978-1-4799-7473-3