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@ARTICLE{Koh:844222,
author = {Koh, D. and Felder, J. and Shah, N. J.},
title = {{A} novel analytical description of periodic volume coil
geometries in {MRI}},
journal = {Journal of magnetic resonance},
volume = {288},
issn = {1090-7807},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2018-01663},
pages = {37 - 42},
year = {2018},
abstract = {MRI volume coils can be represented by equivalent lumped
element circuits and for a variety of these circuit
configurations analytical design equations have been
presented. The unification of several volume coil topologies
results in a two-dimensional gridded equivalent lumped
element circuit which compromises the birdcage resonator,
its multiple endring derivative but also novel structures
like the capacitive coupled ring resonator.The theory
section analyzes a general two-dimensional circuit by noting
that its current distribution can be decomposed into a
longitudinal and an azimuthal dependency. This can be
exploited to compare the current distribution with a
transfer function of filter circuits along one direction.
The resonances of the transfer function coincide with the
resonance of the volume resonator and the simple analytical
solution can be used as a design equation. The proposed
framework is verified experimentally against a novel
capacitive coupled ring structure which was derived from the
general circuit formulation and is proven to exhibit a
dominant homogeneous mode.In conclusion, a unified
analytical framework is presented that allows determining
the resonance frequency of any volume resonator that can be
represented by a two dimensional meshed equivalent circuit.},
cin = {INM-4 / JARA-BRAIN},
ddc = {550},
cid = {I:(DE-Juel1)INM-4-20090406 / $I:(DE-82)080010_20140620$},
pnm = {573 - Neuroimaging (POF3-573)},
pid = {G:(DE-HGF)POF3-573},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29414062},
UT = {WOS:000427807000005},
doi = {10.1016/j.jmr.2018.01.003},
url = {https://juser.fz-juelich.de/record/844222},
}