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@ARTICLE{Maximov:189741,
author = {Maximov, Ivan I. and Vinding, Mads S. and Tse, Desmond H.
Y. and Nielsen, Niels Chr. and Shah, N. J.},
title = {{R}eal-time 2{D} spatially selective {MRI} experiments:
{C}omparative analysis of optimal control design methods},
journal = {Journal of magnetic resonance},
volume = {254},
issn = {1090-7807},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2015-02773},
pages = {110 - 120},
year = {2015},
abstract = {There is an increasing need for development of advanced
radio-frequency (RF) pulse techniques in modern magnetic
resonance imaging (MRI) systems driven by recent
advancements in ultra-high magnetic field systems, new
parallel transmit/receive coil designs, and accessible
powerful computational facilities. 2D spatially selective RF
pulses are an example of advanced pulses that have many
applications of clinical relevance, e.g., reduced field of
view imaging, and MR spectroscopy.The 2D spatially selective
RF pulses are mostly generated and optimised with numerical
methods that can handle vast controls and multiple
constraints. With this study we aim at demonstrating that
numerical, optimal control (OC) algorithms are efficient for
the design of 2D spatially selective MRI experiments, when
robustness towards e.g. field inhomogeneity is in focus. We
have chosen three popular OC algorithms; two which are
gradient-based, concurrent methods using first- and
second-order derivatives, respectively; and a third that
belongs to the sequential, monotonically convergent family.
We used two experimental models: a water phantom, and an in
vivo human head. Taking into consideration the challenging
experimental setup, our analysis suggests the use of the
sequential, monotonic approach and the second-order
gradient-based approach as computational speed, experimental
robustness, and image quality is key. All algorithms used in
this work were implemented in the MATLAB environment and are
freely available to the MRI community.},
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},
UT = {WOS:000355071100015},
doi = {10.1016/j.jmr.2015.03.003},
url = {https://juser.fz-juelich.de/record/189741},
}