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Anatomically-constrained tractography: improved diffusion MRI streamlines tractography through effective use of anatomical information.

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.neuroimage.2012.06.005 Byline: Robert E. Smith, Jacques-Donald Tournier, Fernando Calamante, Alan Connelly Keywords: Magnetic resonance imaging; Diffusion MRI; Fibre-tracking; Tractography; Streamlines Abbrevi... Full description

Journal Title: NeuroImage September 2012, Vol.62(3), pp.1924-1938
Main Author: Smith, Robert E
Other Authors: Tournier, Jacques-Donald , Calamante, Fernando , Connelly, Alan
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1095-9572 ; DOI: 1095-9572 ; DOI: 10.1016/j.neuroimage.2012.06.005
Link: http://search.proquest.com/docview/1030349003/?pq-origsite=primo
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title: Anatomically-constrained tractography: improved diffusion MRI streamlines tractography through effective use of anatomical information.
format: Article
creator:
  • Smith, Robert E
  • Tournier, Jacques-Donald
  • Calamante, Fernando
  • Connelly, Alan
subjects:
  • Brain–Anatomy & Histology
  • Brain Mapping–Methods
  • Diffusion Tensor Imaging–Methods
  • Humans–Methods
  • Image Interpretation, Computer-Assisted–Methods
ispartof: NeuroImage, September 2012, Vol.62(3), pp.1924-1938
description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.neuroimage.2012.06.005 Byline: Robert E. Smith, Jacques-Donald Tournier, Fernando Calamante, Alan Connelly Keywords: Magnetic resonance imaging; Diffusion MRI; Fibre-tracking; Tractography; Streamlines Abbreviations: ACT, Anatomically-Constrained Tractography; b-value, amount of diffusion-weighting applied to an image; b =0, image with zero diffusion-weighting; CSD, Constrained Spherical Deconvolution; DEC, Directionally-Encoded Colour; dFOD, deterministic tractography using Fibre Orientation Distributions; DW, diffusion-weighted; DWI, Diffusion-Weighted Imaging; EPI, echo-planar imaging; FA, Fractional Anisotropy; FACT, Fibre Assignment by Continuous Tracking; FOD, Fibre Orientation Distribution; FoV, field of view; GM-WM interface, grey matter-white matter interface; iFOD2, 2nd-order Integration over Fibre Orientation Distributions; l.sub.max , maximum spherical harmonic order; MPRAGE, Magnetisation-Prepared Rapid Acquisition Gradient Echo; PE, phase-encode; PPF, phase partial Fourier; SNR, signal-to-noise ratio; TDI, Track Density Imaging; WBFACT, Wild-bootstrap Fibre Assignment by Continuous Tracking Abstract: Diffusion MRI streamlines tractography suffers from a number of inherent limitations, one of which is the accurate determination of when streamlines should be terminated. Use of an accurate streamlines propagation mask from segmentation of an anatomical image confines the streamlines to the volume of the brain white matter, but does not take full advantage of all of the information available from such an image. We present a modular addition to streamlines tractography, which makes more effective use of the information available from anatomical image segmentation, and the known properties of the neuronal axons being reconstructed, to apply biologically realistic priors to the streamlines generated; we refer to this as "Anatomically-Constrained Tractography". Results indicate that some of the known false positives associated with tractography algorithms are prevented, such that the biological accuracy of the reconstructions should be improved, provided that state-of-the-art streamlines tractography methods are used. Article History: Accepted 3 June 2012
language: eng
source:
identifier: E-ISSN: 1095-9572 ; DOI: 1095-9572 ; DOI: 10.1016/j.neuroimage.2012.06.005
fulltext: fulltext
issn:
  • 10959572
  • 1095-9572
url: Link


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titleAnatomically-constrained tractography: improved diffusion MRI streamlines tractography through effective use of anatomical information.
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descriptionTo link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.neuroimage.2012.06.005 Byline: Robert E. Smith, Jacques-Donald Tournier, Fernando Calamante, Alan Connelly Keywords: Magnetic resonance imaging; Diffusion MRI; Fibre-tracking; Tractography; Streamlines Abbreviations: ACT, Anatomically-Constrained Tractography; b-value, amount of diffusion-weighting applied to an image; b =0, image with zero diffusion-weighting; CSD, Constrained Spherical Deconvolution; DEC, Directionally-Encoded Colour; dFOD, deterministic tractography using Fibre Orientation Distributions; DW, diffusion-weighted; DWI, Diffusion-Weighted Imaging; EPI, echo-planar imaging; FA, Fractional Anisotropy; FACT, Fibre Assignment by Continuous Tracking; FOD, Fibre Orientation Distribution; FoV, field of view; GM-WM interface, grey matter-white matter interface; iFOD2, 2nd-order Integration over Fibre Orientation Distributions; l.sub.max , maximum spherical harmonic order; MPRAGE, Magnetisation-Prepared Rapid Acquisition Gradient Echo; PE, phase-encode; PPF, phase partial Fourier; SNR, signal-to-noise ratio; TDI, Track Density Imaging; WBFACT, Wild-bootstrap Fibre Assignment by Continuous Tracking Abstract: Diffusion MRI streamlines tractography suffers from a number of inherent limitations, one of which is the accurate determination of when streamlines should be terminated. Use of an accurate streamlines propagation mask from segmentation of an anatomical image confines the streamlines to the volume of the brain white matter, but does not take full advantage of all of the information available from such an image. We present a modular addition to streamlines tractography, which makes more effective use of the information available from anatomical image segmentation, and the known properties of the neuronal axons being reconstructed, to apply biologically realistic priors to the streamlines generated; we refer to this as "Anatomically-Constrained Tractography". Results indicate that some of the known false positives associated with tractography algorithms are prevented, such that the biological accuracy of the reconstructions should be improved, provided that state-of-the-art streamlines tractography methods are used. Article History: Accepted 3 June 2012
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