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Updated: Jul 7, 2026
08:51
Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla
Published on: February 19, 2021
Regional specificity of magnetization transfer imaging in multiple sclerosis
Christopher W Tjoa1, Ralph H B Benedict, Michael G Dwyer
1Buffalo Neuroimaging Analysis Center, Department of Neurology, University at Buffalo, State University of New York, Buffalo, New York, USA.
Summary
This study developed a reproducible regional magnetization transfer ratio (MTR) method. It found selective MTR changes in specific brain regions for multiple sclerosis (MS) patients, showing clinical relevance.
Area of Science:
- Neuroimaging
- Biomedical Engineering
- Radiology
Background:
- Magnetization Transfer Ratio (MTR) is a quantitative MRI technique.
- Understanding regional MTR variations is crucial for neurological disease assessment.
- Multiple Sclerosis (MS) involves white matter and gray matter lesions.
Purpose of the Study:
- To develop and validate a method for generating regional MTR.
- To investigate MTR topography in MS patients and normal controls (NC).
- To preliminarily assess the clinical utility of regional MTR analysis.
Main Methods:
- Utilized semiautomated brain region extraction (SABRE) for 26 regional masks.
- Applied masks to MTR maps, differentiating gray matter (GM) and white matter (WM).
- Examined 45 MS patients (28 RRMS, 17 SPMS) and 19 NC.
Main Results:
- Significant differences in mean MTR were observed between MS patients and NC across 12 SABRE regions.
- All WM regional MTRs differed significantly among RRMS, SPMS, and NC groups (P < .001).
- GM mean MTR in the right medial inferior frontal region predicted disability (P = .031) after correction.
Conclusions:
- The regional MTR approach is reproducible, reliable, and clinically relevant for MS assessment.
- MTI changes in MS are selective to specific sub-regions.
- This method aids in understanding MS pathophysiology and disability progression.
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