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@ARTICLE{Shah:866644,
author = {Shah, N. J. and da Silva, Nuno André and Yun, Seong Dae},
title = {{P}erfusion weighted imaging using combined gradient/spin
echo {EPIK}: {B}rain tumour applications in hybrid
{MR}-{PET}},
journal = {Human brain mapping},
volume = {42},
number = {13},
issn = {1065-9471},
address = {New York, NY},
publisher = {Wiley-Liss},
reportid = {FZJ-2019-05723},
pages = {4144-4154},
year = {2021},
abstract = {Advanced perfusion‐weighted imaging (PWI) methods that
combine gradient echo (GE) and spin echo (SE) data are
important tools for the study of brain tumours. In PWI,
single‐shot, EPI‐based methods have been widely used due
to their relatively high imaging speed. However, when used
with increasing spatial resolution, single‐shot EPI
methods often show limitations in whole‐brain coverage for
multi‐contrast applications. To overcome this limitation,
this work employs a new version of EPI with keyhole (EPIK)
to provide five echoes: two with GEs, two with mixed GESE
and one with SE; the sequence is termed “GESE‐EPIK.”
The performance of GESE‐EPIK is evaluated against its
nearest relative, EPI, in terms of the temporal
signal‐to‐noise ratio (tSNR). Here, data from brain
tumour patients were acquired using a hybrid 3T
MR‐BrainPET scanner.GESE‐EPIK resulted in reduced
susceptibility artefacts, shorter TEs for the five echoes
and increased brain coverage when compared to EPI. Moreover,
compared to EPI, EPIK achieved a comparable tSNR for the
first and second echoes and significantly higher tSNR for
other echoes.A new method to obtain multi‐echo GE and SE
data with shorter TEs and increased brain coverage is
demonstrated. As proposed here, the workflow can be
shortened and the integration of multimodal clinical
MR‐PET studies can be facilitated.},
cin = {INM-4 / INM-11 / JARA-BRAIN},
ddc = {610},
cid = {I:(DE-Juel1)INM-4-20090406 / I:(DE-Juel1)INM-11-20170113 /
$I:(DE-82)080010_20140620$},
pnm = {573 - Neuroimaging (POF3-573) / 5253 - Neuroimaging
(POF4-525)},
pid = {G:(DE-HGF)POF3-573 / G:(DE-HGF)POF4-5253},
typ = {PUB:(DE-HGF)16},
pubmed = {30761676},
UT = {WOS:000683897100007},
doi = {10.1002/hbm.24537},
url = {https://juser.fz-juelich.de/record/866644},
}