Volume 44, Issue 4 pp. 625-632
Full Paper

In vivo fiber tractography using DT-MRI data

Peter J. Basser

Corresponding Author

Peter J. Basser

Section on Tissue Biophysics and Biomimetics, NICHD, Bethesda, Maryland

National Institutes of Health, Bldg. 13, Rm. 3W16, 13 South Drive, Bethesda, MD 20892-5772===Search for more papers by this author
Sinisa Pajevic

Sinisa Pajevic

Mathematical and Statistical Computing Laboratory, CIT; NIH, Bethesda, Maryland

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Carlo Pierpaoli

Carlo Pierpaoli

Section on Tissue Biophysics and Biomimetics, NICHD, Bethesda, Maryland

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Jeffrey Duda

Jeffrey Duda

Section on Tissue Biophysics and Biomimetics, NICHD, Bethesda, Maryland

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Akram Aldroubi

Akram Aldroubi

Department of Mathematics, Vanderbilt University, Nashville, Tennessee

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Abstract

Fiber tract trajectories in coherently organized brain white matter pathways were computed from in vivo diffusion tensor magnetic resonance imaging (DT-MRI) data. First, a continuous diffusion tensor field is constructed from this discrete, noisy, measured DT-MRI data. Then a Frenet equation, describing the evolution of a fiber tract, was solved. This approach was validated using synthesized, noisy DT-MRI data. Corpus callosum and pyramidal tract trajectories were constructed and found to be consistent with known anatomy. The method's reliability, however, degrades where the distribution of fiber tract directions is nonuniform. Moreover, background noise in diffusion-weighted MRIs can cause a computed trajectory to hop from tract to tract. Still, this method can provide quantitative information with which to visualize and study connectivity and continuity of neural pathways in the central and peripheral nervous systems in vivo, and holds promise for elucidating architectural features in other fibrous tissues and ordered media. Magn Reson Med 44:625–632, 2000. Published 2000 Wiley-Liss, Inc.

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