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Erschienen in:
A Volumetric Conformal Mapping Approach for Clustering White Matter Fibers in the Brain Kapitel lesen Erstes Kapitel lesen

2016 | OriginalPaper | Buchkapitel

Reducing Variability in Anatomical Definitions Over Time Using Longitudinal Diffeomorphic Mapping

verfasst von : Daniel J. Tward, Chelsea S. Sicat, Timothy Brown, Arnold Bakker, Michael I. Miller

Erschienen in: Spectral and Shape Analysis in Medical Imaging

Verlag: Springer International Publishing

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Abstract

We address the challenge of variability in the definition of anatomical structures over time in a single subject, using a template-based diffeomorphic mapping algorithm to filter out inconsistencies. Shape changes are parametrized through 2D surfaces, while data attachment is specified through dense 3D images. The mapping uses two geodesic trajectories through diffeomorphism space: template to baseline, and baseline through the timeseries. We apply this algorithm to a study of atrophy in the entorhinal and surrounding cortex in patients with mild cognitive impairment, characterized by rate of change of log-volume. We compare the uncertainty in atrophy rate measured from manual segmentations, to that computed with segmentations filtered using our longitudinal method, and to that computed from FreeSurfer. Our method correlates well with manual (correlation coefficient 0.9881, and results in significantly less variability than manual (p 8.86e-05) and FreeSurfer (p 1.03e-04).

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Vorheriges Kapitel Volume Representation of Parenchymatous Organs by Volumetric Self-organizing Deformable Model
Nächstes Kapitel Spatio-Temporal Shape Analysis of Cross-Sectional Data for Detection of Early Changes in Neurodegenerative Disease
Fußnoten
1
Data used in the preparation of this article were obtained from the Alzheimer’s Disease Neuroimaging Initiative (ADNI) database (http://​adni.​loni.​usc.​edu). The ADNI was launched in 2003 as a public-private partnership, led by Principal Investigator Michael W. Weiner, MD. The primary goal of ADNI has been to test whether serial magnetic resonance imaging (MRI), positron emission tomography (PET), other biological markers, and clinical and neuropsychological assessment can be combined to measure the progression of mild cognitive impairment (MCI) and early Alzheimer’s disease (AD). For up-to-date information, see http://​www.​adni-info.​org.
 
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Metadaten
Titel
Reducing Variability in Anatomical Definitions Over Time Using Longitudinal Diffeomorphic Mapping
verfasst von
Daniel J. Tward
Chelsea S. Sicat
Timothy Brown
Arnold Bakker
Michael I. Miller
Copyright-Jahr
2016
Buch
Spectral and Shape Analysis in Medical Imaging

Print ISBN: 978-3-319-51236-5

Electronic ISBN: 978-3-319-51237-2

Copyright-Jahr: 2016

DOI
https://doi.org/10.1007/978-3-319-51237-2_5