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Updated: Aug 13, 2026
Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Diffusion tensor magnetic resonance imaging in multiple sclerosis
Daniel Goldberg-Zimring1, Andrea U J Mewes, Mahnaz Maddah
1Computational Radiology Laboratory, Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. daniel@bwh.harvard.edu
Abstract:
Multiple sclerosis (MS), a demyelinating disease, occurs principally in the white matter (WM) of the central nervous system. Conventional magnetic resonance imaging (MRI) is sensitive to some, but not all, brain changes associated with MS. Diffusion-weighted imaging (DWI) provides information about water diffusion in tissue and diffusion tensor MRI (DT-MRI) about fiber direction, allowing for the identification of WM abnormalities that are not apparent on conventional MRI images. These techniques can quantitatively characterize the local microstructure of tissues. MS-associated disease processes lead to regions characterized by an increased amount of water diffusion and a decrease in the anisotropy of diffusion direction. These changes have been found to produce different patterns in MS patients presenting different courses of the disease. Changes in water diffusion may allow examination of the type, appearance, enhancement, and location of lesions not readily visible by other means. Ongoing studies of MS are integrating conventional MRI and DT-MRI measures with connectivity-based regional assessment, aiming to provide a better understanding of the nature and the location of WM lesions. This integration and the development of novel image-processing and visualization techniques may improve the understanding of WM architecture and its disruption in MS. This article presents a brief history of DWI, its basic principles and applications in the study of MS, a review of the properties and applications of DT-MRI, and their use in the study of MS. In addition, this article illustrates the methodology for the analysis of DT-MRI in ongoing studies of MS.
Insights
Diffusion-weighted imaging (DWI) and diffusion tensor MRI (DT-MRI) reveal white matter changes in multiple sclerosis (MS) not seen with conventional MRI. These advanced MRI techniques offer new insights into MS lesion characteristics and brain microstructure.
Area of Science:
- Neuroimaging
- Neurology
- Biomedical Engineering
Background:
- Multiple sclerosis (MS) is a central nervous system demyelinating disease primarily affecting white matter (WM).
- Conventional MRI detects some MS-related brain changes, but not all.
- Advanced MRI techniques like DWI and DT-MRI offer enhanced sensitivity to WM microstructural alterations.
Purpose of the Study:
- To review the principles and applications of Diffusion-Weighted Imaging (DWI) and Diffusion Tensor MRI (DT-MRI) in studying MS.
- To highlight how these techniques identify WM abnormalities not visible with conventional MRI.
- To discuss the integration of DWI/DT-MRI with other methods for a comprehensive understanding of MS pathology.
Main Methods:
- Review of Diffusion-Weighted Imaging (DWI) principles and applications in MS.
- Review of Diffusion Tensor MRI (DT-MRI) properties and applications in MS.
- Discussion of integrating conventional MRI and DT-MRI with connectivity-based assessment and novel image processing.
Main Results:
- DWI and DT-MRI can quantitatively characterize tissue microstructure by assessing water diffusion and diffusion direction anisotropy.
- MS disease processes alter water diffusion and diffusion direction anisotropy, creating distinct patterns related to disease course.
- These advanced MRI techniques can reveal lesion types, appearances, enhancement, and locations not readily visible with conventional methods.
Conclusions:
- DWI and DT-MRI are valuable tools for detecting and characterizing white matter microstructural changes in multiple sclerosis.
- These advanced imaging modalities provide insights into the nature and location of MS lesions, improving understanding of WM disruption.
- Ongoing research integrating these techniques promises a more comprehensive understanding of MS pathophysiology.
