Ultra-high field 7 T imaging in multiple sclerosis

Area of Science:

• Neuroimaging
• Magnetic Resonance Imaging
• Neurology

Background:

• Multiple sclerosis (MS) is a heterogeneous neurological disease characterized by demyelination and axonal damage.
• Conventional MRI has limitations in visualizing subtle MS pathologies, particularly in the cortex and deep brain structures.

Purpose of the Study:

• To review the applications of ultra-high field 7 Tesla (7T) MRI in characterizing MS.
• To highlight advancements in detecting and analyzing MS lesions using 7T MRI.

Main Methods:

• Utilizing 7T MRI for in vivo imaging of MS patients.
• Comparing 7T MRI findings with conventional MRI for lesion detection and characterization.
• Analyzing cortical lesions, white matter plaques, and lesions in challenging anatomical regions like the thalamus, cerebellum, and spinal cord.

Main Results:

• 7T MRI demonstrates twice the sensitivity for cortical lesion detection compared to lower field strengths, especially for subpial lesions.
• Cortical lesion load is an independent predictor of disability progression in MS.
• 7T MRI enables detailed characterization of white matter lesions, including identification of central veins and paramagnetic rims, aiding MS diagnosis.
• Improved delineation and characterization of lesions in the cerebellum and spinal cord are achieved with 7T MRI.

Conclusions:

• Ultra-high field 7T MRI offers comprehensive insights into MS pathophysiology.
• Advanced imaging at 7T opens new avenues for clinical evaluation and therapeutic development in MS.