Relayed nuclear Overhauser effect weighted (rNOEw) imaging identifies multiple sclerosis

Area of Science:

• Neuroimaging
• Radiology
• Immunology

Background:

• Multiple sclerosis (MS) is an autoimmune CNS disease causing demyelination and axonal injury.
• Magnetic resonance imaging (MRI) is crucial for MS diagnosis, with various techniques used.
• Differentiating MS from similar conditions like neuromyelitis optica spectrum disorders (NMOSD) is clinically important.

Purpose of the Study:

• To evaluate the utility of relayed nuclear Overhauser effect weighted (rNOEw) imaging for MS diagnosis.
• To compare rNOEw imaging findings in MS patients, NMOSD patients, and normal controls.
• To assess the potential of rNOEw imaging to distinguish MS from NMOSD.

Main Methods:

• Applied whole-brain rNOEw imaging at 3T in 21 MS patients, 14 NMOSD patients, and 20 normal controls.
• Acquired control and labeled images within four minutes for each subject.
• Analyzed brain rNOEw contrast differences across the groups and in specific brain regions.

Main Results:

• Significantly lower brain rNOEw contrast was observed in MS patients compared to both normal controls (P=0.008) and NMOSD patients (P=0.014).
• No significant difference in rNOEw contrast was found between normal controls and NMOSD patients (P=0.939).
• MS lesions exhibited higher numbers, larger sizes, and lower rNOEw contrast than NMOSD lesions (P=0.002).

Conclusions:

• rNOEw imaging demonstrates potential as a novel tool to aid in the diagnosis of MS.
• The technique shows promise in differentiating MS from NMOSD based on distinct brain contrast patterns.
• This imaging method could improve diagnostic accuracy and patient stratification in CNS inflammatory diseases.