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Field Distribution and Coupling Investigation of an Eight-Channel RF Coil Consisting of Different Dipole Coil Elements for 7 T MRI | IEEE Journals & Magazine | IEEE Xplore

Field Distribution and Coupling Investigation of an Eight-Channel RF Coil Consisting of Different Dipole Coil Elements for 7 T MRI


Abstract:

In this contribution, we investigate the B1 distribution and coupling characteristics of a multichannel radio frequency (RF) coil consisting of different dipole coil elem...Show More

Abstract:

In this contribution, we investigate the B1 distribution and coupling characteristics of a multichannel radio frequency (RF) coil consisting of different dipole coil elements for 7 T MRI, and explore the feasibility to achieve a compromise between field distribution and decoupling by combining different coil elements. Two types of dipole elements are considered here: the meander dipole element with a chip-capacitor-based connection to the RF shield which achieves a sufficient decoupling between the neighboring elements; and the open-ended meander dipole element which exhibits a broader magnetic field distribution. By nesting the open-ended dipole elements in between the ones with end-capacitors, the B1 distribution, in terms of field penetration depth and homogeneity, is improved in comparison to the dipole coil consisting only of the elements with end-capacitors, and at the same time, the adjacent elements are less coupled to each other in comparison to the dipole coil consisting only of the open-ended elements. The proposed approach is validated by both full-wave simulation and experimental results.
Published in: IEEE Transactions on Biomedical Engineering ( Volume: 64, Issue: 6, June 2017)
Page(s): 1297 - 1304
Date of Publication: 25 August 2016

ISSN Information:

PubMed ID: 27576239

Funding Agency:


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