Show Summary Details
Page of

Neuroanatomy of Specific Reading Disabilities III: Diffusion Tensor Imaging 

Neuroanatomy of Specific Reading Disabilities III: Diffusion Tensor Imaging
Chapter:
Neuroanatomy of Specific Reading Disabilities III: Diffusion Tensor Imaging
Author(s):

Yitzchak Frank

DOI:
10.1093/med/9780199862955.003.0007
Page of

PRINTED FROM OXFORD MEDICINE ONLINE (www.oxfordmedicine.com). © Oxford University Press, 2016. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Medicine Online for personal use (for details see Privacy Policy and Legal Notice).

date: 18 January 2020

Diffusion tensor imaging (DTI) is a neuroimaging method that provides information about the degree and direction of water diffusion within individual voxels of the magnetic resonance image, providing clues to the structure of the tissues. Neuroimaging with DTI is based on the fact that diffusion is isotropic (equal in all directions) in cerebral spinal fluid and cell bodies but anisotropic (greater in one direction than the other directions) in the white matter (which is comprised of myelinated axons, organized into fiber bundles). In cerebral gray matter, internal cellular structures and cell membranes slow the rate of diffusion in comparison with the rate in cerebral spinal fluid, but diffusion remains isotropic (equal in all directions). In white matter, cell structure impedes the rate of diffusion perpendicular to the directional orientation of the axon fibers, while leaving the rate of diffusion parallel to the axon relatively unhindered.

Access to the complete content on Oxford Medicine Online requires a subscription or purchase. Public users are able to search the site and view the abstracts for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can't find the answer there, please contact us.