Fibertract segmentation in position orientation space from high angular resolution diffusion MRI

Details

Serval ID
serval:BIB_277FFE75DC41
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Fibertract segmentation in position orientation space from high angular resolution diffusion MRI
Journal
Neuroimage
Author(s)
Hagmann  P., Jonasson  L., Deffieux  T., Meuli  R., Thiran  J. P., Wedeen  V. J.
ISSN
1053-8119
Publication state
Published
Issued date
08/2006
Peer-reviewed
Oui
Volume
32
Number
2
Pages
665-75
Notes
Journal Article
Research Support, Non-U.S. Gov't --- Old month value: Aug 15
Abstract
In diffusion MRI, standard approaches for fibertract identification are based on algorithms that generate lines of coherent diffusion, currently known as tractography. A tract is then identified as a set of such lines selected on some criteria. In the present study, we investigate whether fibertract identification can be formulated as a segmentation task that recognizes a fibertract as a region where diffusion is intense and coherent. Indeed, we show that it is possible to segment efficiently well-known fibertracts with classical image processing methods provided that the problem is formulated in a five-dimensional space of position and orientation. As an example, we choose to adapt to this newly defined high-dimensional non-Euclidean space, called position orientation space, an algorithm based on the hidden Markov random field framework. Structures such as the cerebellar peduncles, corticospinal tract, association bundles can be identified and represented in three dimensions by a back projection technique similar to maximum intensity projection. Potential advantages and drawbacks as compared to classical tractography are discussed; for example, it appears that our formulation handles naturally crossing tracts and is not biased by human intervention.
Keywords
*Algorithms Brain/*anatomy & histology Brain Mapping Brain Stem/anatomy & histology Diffusion Magnetic Resonance Imaging/*methods Dominance, Cerebral/physiology Fourier Analysis Humans Image Processing, Computer-Assisted/methods Imaging, Three-Dimensional/*methods Markov Chains Mathematical Computing Nerve Fibers/*ultrasonography Neural Pathways/*anatomy & histology *Software
Pubmed
Web of science
Create date
08/04/2008 14:48
Last modification date
20/08/2019 13:06
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