Comparison of 1.5T vs. 3T Protocols After Treatment With Glatiramer Acetate (GA)

Interferon-β (IFN- β) and glatiramer acetate (GA) are the two main groups of drugs used in the treatment of multiple sclerosis (MS). Notably, while both ultimately decrease central nervous system (CNS) inflammation, they do so by very different mechanisms. Therefore, use of 1.5T MRI, triple dose of Gd, delay of scanning time for 20-30 min after Gd injection, and application of off-resonance saturated MT pulse may increase the ability to detect Gd lesions by approximately 120% when compared to 1.5T single dose MRI protocol. The 3T standard protocol may increase the ability to detect Gd enhancing lesions by 40-50% when compared to the 1.5T standard protocol. This may indicate that the 3T optimized protocol may increase the ability for Gd lesion detection by approximately 150-180%, when compared to the 1.5T standard protocol.

Inclusion criteria

• Patients diagnosed with clinically definite MS according to the McDonald criteria
• Have a Gd enhancing lesion using 1.5T standard protocol and/or an acute relapse
• Age 18-65
• Have a relapsing-remitting (RR) disease course or clinically isolated syndrome (CIS) with high risk of conversion to clinically definite (CD) MS (presence of >9 T2 lesions in addition to 1 Gd lesion)
• Have EDSS scores less than or equal to 5.5
• Have disease duration of 3 months to 30 years
• None of the exclusion criteria

Exclusion criteria

• Previous immunomodulatory or immunosuppressant treatment during the 30 days prior to day 0 of the study with the following agents (e.g., IFN-β, GA, mitoxantrone, cyclophosphamide, cladribine, fludarabine, cyclosporine, total body, azathioprine, methotrexate, IVIG, cellcept, natalizumab, etc.)