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@ARTICLE{Choi:999149,
author = {Choi, Chang-Hoon and Webb, Andrew and Orzada, Stephan and
Kelenjeridze, Mikheil and Shah, N. Jon and Felder, Jorg},
title = {{A} {R}eview of {P}arallel {T}ransmit {A}rrays for
{U}ltra-{H}igh {F}ield {MR} {I}maging},
journal = {IEEE reviews in biomedical engineering},
volume = {17},
issn = {1937-3333},
address = {New York, NY},
publisher = {IEEE},
reportid = {FZJ-2023-01193},
pages = {351-368},
year = {2023},
abstract = {Parallel transmission (pTX) techniques are required to
tackle a number of challenges, e.g., the inhomogeneous
distribution of the transmit field and elevated specific
absorption rate (SAR), in ultra-high field (UHF) MR imaging.
Additionally, they offer multiple degrees of freedom to
create temporally- and spatially-tailored transverse
magnetization. Given the increasing availability of MRI
systems at 7 T and above, it is anticipated that interest in
pTX applications will grow accordingly. One of the key
components in MR systems capable of pTX is the design of the
transmit array, as this has a major impact on performance in
terms of power requirements, SAR and RF pulse design. While
several reviews on pTX pulse design and the clinical
applicability of UHF exist, there is currently no systematic
review of pTX transmit/transceiver coils and their
associated performance. In this paper, we analyze transmit
array concepts to determine the strengths and weaknesses of
different types of design. We systematically review the
different types of individual antennas employed for UHF,
their combination into pTX arrays, and methods to decouple
the individual elements. We also reiterate figures-of-merit
(FoMs) frequently employed to describe the performance of
pTX arrays and summarize published array designs in terms of
these FoMs.},
cin = {INM-4},
ddc = {570},
cid = {I:(DE-Juel1)INM-4-20090406},
pnm = {5253 - Neuroimaging (POF4-525) / DFG project
G:(GEPRIS)491111487 - Open-Access-Publikationskosten / 2025
- 2027 / Forschungszentrum Jülich (OAPKFZJ) (491111487)},
pid = {G:(DE-HGF)POF4-5253 / G:(GEPRIS)491111487},
typ = {PUB:(DE-HGF)16},
pubmed = {37022919},
UT = {WOS:001166967200013},
doi = {10.1109/RBME.2023.3244132},
url = {https://juser.fz-juelich.de/record/999149},
}