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@ARTICLE{Hong:861300,
author = {Hong, Suk-Min and Choi, Chang-Hoon and Magill, Arthur W.
and Jon Shah, N. and Felder, Jarg},
title = {{D}esign of a {Q}uadrature 1{H}/31{P} {C}oil {U}sing {B}ent
{D}ipole {A}ntenna and {F}our-{C}hannel {L}oop at 3{T}
{MRI}},
journal = {IEEE transactions on medical imaging},
volume = {37},
number = {12},
issn = {0278-0062},
address = {New York, NY},
publisher = {IEEE},
reportid = {FZJ-2019-01795},
pages = {2613 - 2618},
year = {2018},
abstract = {MRI using nuclei other than protons is of clinical interest
due to the important role of these nuclei in cellular
processes. Phosphorous-31 ( 31 P), for example, plays an
important role in energy metabolism. However, measurement of
31 P can be challenging, as the receive signal is weak
compared with that of proton ( 1 H). Consequently, it is
often necessary to integrate 1 H elements for localizations
and B0 shimming in RF coils intended for 31 P measurements.
Good decoupling between the 1 H and the 31 P elements is
therefore essential. In this paper, bent dipole antennas
tuned to 1 H were integrated with a four channel 31 P loop
coil array, in a manner providing strong geometric
decoupling between dipoles and loops. As the physical length
of a resonant dipole antenna is too long at 3T, the dipole
antennas were bent around the load. The loss of 31 P
elements due to the presence of the dipole antennas was
evaluated by measuring scattering parameters and comparing
the SNR of 31 P spectra with and without the presence of the
dipole antennas. The performance of the bent dipole antenna
was evaluated by simulation and sensitivity measurement. The
Q-factors and the SNR of the four-loop array were reduced by
less than $5\%$ when the bent dipole antennas were
introduced. The measured sensitivity of the bent dipole was
higher $(15\%)$ than that of dual-tuned birdcage. The
combined bent dipole and loop array is therefore a promising
design for 1 H/ 31 P applications at 3T.},
cin = {INM-4 / INM-11 / JARA-BRAIN},
ddc = {620},
cid = {I:(DE-Juel1)INM-4-20090406 / I:(DE-Juel1)INM-11-20170113 /
$I:(DE-82)080010_20140620$},
pnm = {573 - Neuroimaging (POF3-573)},
pid = {G:(DE-HGF)POF3-573},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29994198},
UT = {WOS:000451903400006},
doi = {10.1109/TMI.2018.2844462},
url = {https://juser.fz-juelich.de/record/861300},
}