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@ARTICLE{Grinberg:837814,
author = {Grinberg, Farida and Maximov, Ivan I. and Farrher, Ezequiel
and Shah, N. J.},
title = {{M}icrostructure-informed slow diffusion tractography in
humans enhances visualisation of fibre pathways},
journal = {Magnetic resonance imaging},
volume = {45},
issn = {0730-725X},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2017-06603},
pages = {7 - 17},
year = {2018},
abstract = {Conventional fibre tractography methods based on diffusion
tensor imaging exploit diffusion anisotropy and
directionality in the range of low diffusion weightings
(b-values). High b-value Biexponential Diffusion Tensor
Analysis reported previously has demonstrated that
fractional anisotropy of the slow diffusion component is
essentially higher than that of conventional diffusion
tensor imaging whereas popular compartment models associate
this slow diffusion component with axonal water fraction.
One of the primary aims of this study is to elucidate the
feasibility and potential benefits of
“microstructure-informed” whole-brain slow-diffusion
fibre tracking (SDIFT) in humans. In vivo diffusion-weighted
images in humans were acquired in the extended range of
diffusion weightings ≤ 6000 s mm− 2 at 3 T. Fast and
slow diffusion tensors were reconstructed using the
bi-exponential tensor decomposition, and a detailed
statistical analysis of the relevant whole-brain tensor
metrics was performed. We visualised three-dimensional fibre
tracts in in vivo human brains using deterministic
streamlining via the major eigenvector of the slow diffusion
tensor. In particular, we demonstrated that slow-diffusion
fibre tracking provided considerably higher fibre counts of
long association fibres and allowed one to reconstruct more
short association fibres than conventional diffusion tensor
imaging. SDIFT is suggested to be useful as a complimentary
method capable to enhance reliability and visualisation of
the evaluated fibre pathways. It is especially informative
in precortical areas where the uncertainty of the
mono-exponential tensor evaluation becomes too high due to
decreased anisotropy of low b-value diffusion in these
areas. Benefits can be expected in assessment of the
residual axonal integrity in tissues affected by various
pathological conditions, in surgical planning, and in
evaluation of cortical connectivity, in particular, between
Brodmann's areas.},
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)},
pid = {G:(DE-HGF)POF3-573},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000417772500002},
doi = {10.1016/j.mri.2017.08.007},
url = {https://juser.fz-juelich.de/record/837814},
}