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Updated: Jan 15, 2026
Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla
Published on: February 19, 2021
Saturation-Transfer-Based MRI of the Brain in Multiple Sclerosis Patients at 3T
Ziyan Wang1, Yingying Lin1, Peng Cao1
1Department of Diagnostic Radiology, The University of Hong Kong, Hong Kong, China.
Background:
Multiple sclerosis (MS) is an autoimmune demyelinating disease that attacks myelin. MRI is an important imaging modality for diagnosis and monitoring in MS. However, the current standard MRI protocol for MS lacks sequences capable of detecting molecular changes.
Purpose:
To present a saturation-transfer-based MRI protocol, including chemical exchange saturation transfer (CEST) and magnetization transfer indirect spin labeling (MISL) sequences, for quantifying molecular changes and water exchange in the brain of MS patients.
Study Type:
Prospective.
Population:
Fifty-two participants including 31 healthy controls (HC) (18 females and 13 males) and 21 MS patients (18 females and 3 males).
Field Strength/Sequence:
3D inversion-prepared gradient echo T1w, 3D fast spin echo T2w, 3D CUBE CEST and MISL at 3.0 T.
Assessment:
Multiple CEST contrasts between HC and MS groups were analyzed using double-step multi-pool Lorentzian fitting (DMPLF) and Lorentzian difference analysis (LDA) to evaluate and compare their diagnostic performance. MISL signals at -20 and -10 ppm were quantified by the normalized signal reduction in cerebrospinal fluid (CSF). T1w MRI was used to quantify brain volumes.
Statistical Tests:
Unpaired Student's t-test, receiver operating characteristic (ROC) curve, area under the curve (AUC), and binary logistic regression analysis. p < 0.05 was considered statistically significant.
Results:
CEST detected decreased signals in the brain of MS patients using both DMPLF and LDA, with DMPLF demonstrating superior performance in differentiating MS from HC (AUC, 0.93; 95% CI: 0.86, 1.00). MS patients showed significantly lower whole brain MISL signals than HCs at both -20 ppm (0.04 ± 0.01 vs. 0.06 ± 0.02) and -10 ppm (0.06 ± 0.02 vs. 0.08 ± 0.02). MS patients showed a significant decrease (-6.57%) in brain tissue and an increase (+20.73%) in CSF volume ratios compared to HCs.
Data Conclusion:
The saturation-transfer-based MRI framework can effectively evaluate molecular changes and CSF-tissue water exchange in the brains of MS patients.
Evidence Level:
2.
Technical Efficacy:
Stage 3.
Insights
This study introduces a new MRI technique for multiple sclerosis (MS) that effectively detects molecular changes and water exchange in the brain, improving diagnosis and monitoring of this autoimmune disease.
Area of Science:
- Neuroimaging
- Biomedical Engineering
- Radiology
Background:
- Multiple sclerosis (MS) is an autoimmune disease targeting myelin, requiring advanced MRI for diagnosis and monitoring.
- Current MRI protocols for MS lack sequences to detect crucial molecular changes.
- Understanding molecular alterations and water exchange is key to MS progression.
Purpose of the Study:
- To introduce a novel saturation-transfer-based MRI protocol for MS.
- To quantify molecular changes and water exchange in MS patients' brains using CEST and MISL sequences.
- To assess the diagnostic performance of the new MRI protocol.
Main Methods:
- A prospective study involving 52 participants (21 MS patients, 31 healthy controls).
- Utilized 3.0T MRI with 3D inversion-prepared gradient echo T1w, 3D fast spin echo T2w, 3D CUBE CEST, and MISL sequences.
- Analyzed data using double-step multi-pool Lorentzian fitting (DMPLF), Lorentzian difference analysis (LDA), ROC curves, and logistic regression.
Main Results:
- Chemical Exchange Saturation Transfer (CEST) detected decreased brain signals in MS patients, with DMPLF showing high diagnostic accuracy (AUC=0.93).
- Magnetization Transfer Indirect Spin Labeling (MISL) revealed significantly lower signals in MS patients at -20 and -10 ppm.
- MS patients exhibited reduced brain tissue volume and increased cerebrospinal fluid (CSF) volume compared to controls.
Conclusions:
- The saturation-transfer-based MRI framework effectively evaluates molecular changes in MS.
- This advanced MRI protocol can quantify CSF-tissue water exchange in MS patients.
- The findings suggest improved diagnostic and monitoring capabilities for MS using this novel MRI approach.
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