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@ARTICLE{Berron:139495,
author = {Berron, D. and Vieweg, P. and Hochkeppler, A. and Pluta, J.
B. and Ding, S-L and Maaß, Anne and Luther, A. and Xie, L.
and Das, S. R. and Wolk, D. A. and Wolbers, T. and
Yushkevich, P. A. and Düzel, E. and Wisse, L. E. M.},
title = {{A} protocol for manual segmentation of medial temporal
lobe subregions in 7 {T}esla {MRI}.},
journal = {NeuroImage: Clinical},
volume = {15},
issn = {2213-1582},
address = {[Amsterdam u.a.]},
publisher = {Elsevier},
reportid = {DZNE-2020-05817},
pages = {466-482},
year = {2017},
abstract = {Recent advances in MRI and increasing knowledge on the
characterization and anatomical variability of medial
temporal lobe (MTL) anatomy have paved the way for more
specific subdivisions of the MTL in humans. In addition,
recent studies suggest that early changes in many
neurodegenerative and neuropsychiatric diseases are better
detected in smaller subregions of the MTL rather than with
whole structure analyses. Here, we developed a new protocol
using 7 Tesla (T) MRI incorporating novel anatomical
findings for the manual segmentation of entorhinal cortex
(ErC), perirhinal cortex (PrC; divided into area 35 and 36),
parahippocampal cortex (PhC), and hippocampus; which
includes the subfields subiculum (Sub), CA1, CA2, as well as
CA3 and dentate gyrus (DG) which are separated by the
endfolial pathway covering most of the long axis of the
hippocampus. We provide detailed instructions alongside
slice-by-slice segmentations to ease learning for the
untrained but also more experienced raters. Twenty-two
subjects were scanned (19-32 yrs, mean age = 26 years, 12
females) with a turbo spin echo (TSE) T2-weighted MRI
sequence with high-resolution oblique coronal slices
oriented orthogonal to the long axis of the hippocampus
(in-plane resolution 0.44 × 0.44 mm2) and 1.0 mm slice
thickness. The scans were manually delineated by two
experienced raters, to assess intra- and inter-rater
reliability. The Dice Similarity Index (DSI) was above 0.78
for all regions and the Intraclass Correlation Coefficients
(ICC) were between 0.76 to 0.99 both for intra- and
inter-rater reliability. In conclusion, this study presents
a fine-grained and comprehensive segmentation protocol for
MTL structures at 7 T MRI that closely follows recent
knowledge from anatomical studies. More specific
subdivisions (e.g. area 35 and 36 in PrC, and the separation
of DG and CA3) may pave the way for more precise
delineations thereby enabling the detection of early
volumetric changes in dementia and neuropsychiatric
diseases.},
keywords = {Adult / Brain Mapping: methods / Brain Mapping: standards /
Dentate Gyrus: diagnostic imaging / Dentate Gyrus:
physiology / Female / Hippocampus: diagnostic imaging /
Hippocampus: physiology / Humans / Magnetic Resonance
Imaging: methods / Magnetic Resonance Imaging: standards /
Male / Temporal Lobe: diagnostic imaging / Temporal Lobe:
physiology / Young Adult},
cin = {AG Düzel / AG Wolbers / Core Technical Staff},
ddc = {610},
cid = {I:(DE-2719)5000006 / I:(DE-2719)1310002 /
I:(DE-2719)1340007},
pnm = {344 - Clinical and Health Care Research (POF3-344)},
pid = {G:(DE-HGF)POF3-344},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28652965},
pmc = {pmc:PMC5476466},
doi = {10.1016/j.nicl.2017.05.022},
url = {https://pub.dzne.de/record/139495},
}